{"title":"Baader Visual \u0026 Planetary Filters","description":"\u003cp\u003eBaader visual \u0026amp; planetary filters. Part of \u003ca href=\"\/collections\/baader-filters\"\u003eBaader Planetarium Filters\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"baader-u-venus-filter-1-25","title":"Baader U-Venus-Filter 1.25","description":"\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eBaader U-Filter (Venus and UV) 1¼?\" and 2\"\u003c\/h3\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eBaader U-Filter with a Transmission peak approx 80% at CWL 350nm , bandwidth 60nm (320-380nm), with complete blocking of the spectral range from 200nm to 1120nm. Dielectric multi-coated coating on optically polished Schott glass UG-11. Enables shooting in the deep UV spectral region; a wavelength range that was previous inaccessible for amateur astronomers. The Solar Calcium K-Line also is within the passband of this filter.\u003c\/p\u003e\u003cdiv class=\"important-note\" style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 10px; font-family: \" open sans sans-serif rgb solid background-color:=\"\" border:=\"\" border-radius:=\"\" font-size:=\"\"\u003e\n\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); line-height: 1.4; text-rendering: optimizespeed; text-transform: uppercase;\"\u003eIMPORTANT NOTE:\u003c\/h4\u003e\n\u003cp style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eThe Baader U-Filter was created for imaging Venus with a webcam, CCD and CMOS cameras. Using the filter for visual observations is impossible due to the eye's insensitivity to this spectral range (UV).\u003c\/p\u003e\n\u003c\/div\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eRequirements for Successful use of this Filter\u003c\/h3\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eUV sensitive imaging camera such as the SKYRIS 274M with at least a telescope of 5\" diameter. A telescope with 8\" diameter is recommended.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eSingle Shot CCD are not suitable for use with the U-Filter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(34, 34, 34); font-family: \" open sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/primel_89552741-5908-4b48-acc0-78b5e11b038a.jpg?v=1766554315\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/logo_dodi_sunspot_01_318ad84b-6926-4fcd-bc89-d9a0503b8a07.jpg?v=1766554304\" height=\"144\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eAnother field of application is the recording of the flare structures of the solar atmosphere - not just the edge of the Sun, but also in the solar centre. The Calcium-K line, where the torch areas are clearly visible, lying in the passband of the filter. \u0026amp; Copy; Dominique Dierick\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/baader-ufilter-neu-c14_2010-07-01_2017-09-49_463abb86-c2c9-42cb-b853-4cddf3b9bb96.jpg?v=1766554307\" height=\"150\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eVenus Recording © W. Paech\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/venus_2007_paech_bc39c18c-4663-4e02-af72-5eb0deb7f898.jpg?v=1766554309\" height=\"135\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eVenus Recording © W. Paech\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/rietze_venus_321e301c-9d12-48bf-8d5e-a7d0f2e125cf.gif?v=1766554312\" height=\"150\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eVenus Sickle – 2\/3 closed, a rare photo © M. Rietze\u003c\/div\u003e\n\u003c\/div\u003e\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003ePhilosophy, Application and Technique\u003c\/h3\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe planet Venus is surrounded by a closed cloud cover, which moves at high speed around the planet. Here, different cloud bands, which show a steady change of details form similar to the cloud cover of Jupiter. Unfortunately, these clouds can not be seen in visible light, unlike Jupiter, meaning Venus appears completely structureless. However, by using a camera that is sensitive to inaccessible wavelengths unlike the eye, this cloud structure detail can be seen, in particular using ideal wavelengths in UV range between 320nm and 390nm.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eSince the early days of amateur astronomy, amateurs have been trying to work in this light. The difficulty is procuring a suitable filter to work precisely in this short wavelength region adequately. A sharp short-pass filter with high transmission is virtually impossible to produce. This also applies, surprisingly, to interference filters. While a theoretically ideal UV bandpass can be produced, there is inevitably at least one second passage window in the visible range. This is fatal because this undesirable area cannot be blocked with coloured glass. In such a case you would need again an ideal short-pass filter, which again is not produced in sufficient quality.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eAmateurs have tried with modest success to create a filter for stacking one UV passage without a second passage area. This meant a strongly reduced contrast and modest transmission, which is not ideal. Those who believe you can make do with a less transmission filter are soon disabused. In addition the glass of many telescope optics in the UV have a much lower transmission, which does not help.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe good idea of using an excellent UV-interference filter with a second window in the visible light, and evaluate only the blue channel in the resulting images of the colour camera used of course does not either. The filter on the semiconductor is subject to the same problems mentioned above. Also the blue channel gets light from the other channels added to it. Since the semiconductor is not very UV sensitive, the low leakage of the visual light tends to be shifted to the UV. This double image show significantly the effect of refraction and can make the UV detail inaccessible due to this inefficient rejection of light outside of the 320-390nm spectral range.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eWith the latest dielectric coating technology, it is possible to achieve an ideal UV characteristic with the highest transmission while blocking other transmission windows. This has made it possible for the first time for an amateur astronomer to photographically observe the changing clouds of Venus and to say goodbye to the vacuous white crescent. All Baader filters are finely polished optically (increases image quality). High magnification during eyepiece projection is also possible, without reducing the sharpness of the optics.\u003c\/p\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/primel_89552741-5908-4b48-acc0-78b5e11b038a.jpg?v=1766554315\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/primel_89552741-5908-4b48-acc0-78b5e11b038a.jpg?v=1766554315\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003c\/div\u003e\u003chr style=\"box-sizing: border-box; margin: 0px; padding: 0px; color: rgb(34, 34, 34); font-family: \" open sans sans-serif rgb font-size:=\"\" background-color:=\"\"\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e \u003c\/p\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/u_filter_beb2ba57-230c-4d25-a5ba-a87d71eae664.jpg?v=1766554317\" height=\"122\" width=\"150\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/div\u003e\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eNon-Astronomical Application Areas\u003c\/h3\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThese filters can be used in the observation, by technical photography, of nature. For instance they are used to determine the health of plants. Automotive experts can examine if a vehicle has been repaired as the repaired surfaces are very clearly seen due to differing reflectance. Many other applications are still in testing.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eLeft Picture:\u003c\/strong\u003e Dr. K. Schmitt is using our UV filters to assess the damage by disease. In this example to make the damage to Primroses clearly visible a normal daylight and a UV image are taken. Using a subtraction algorithm the difference in the image shows the damage much more clearly than in the visual image. The pictures were taken with a Nikon D70, Nikkor 105mm UV.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\u003cstrong style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003eRight Picture: \u003c\/strong\u003eI am truly pleased with the new 2\" Baader U filter. I thank you and your team for making it! A TRUE MASTERPIECE ! You can see an Ultraviolet capture using this filter on a Nikon D70 camera. The car is uniformly a metallic grey under normal, visible light. The non-factory paint job shows up only under UV. This is my year round test object. With best regards, Sincerely, Vivek Iyer.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Baader U Filter is only produced in set sizes relevant for use with astronomical telescopes. However, we do produce a family of adaptor rings to mount any of our 2 inch (50.8mm) filters in front of any camera lens which has a filter thread. It is important to note that not all cameras and lenses are suited to UV photography and this could result in a low signal to noise ratio in the image produced. For best results it is advised to use a specialized camera body responsive to UV light (that does not have typical blocking filters that everyday cameras have) and a suitable UV-transmitting photographic lens which has adequate glass substrates for the transmission of UV light.\u003c\/p\u003e\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013472743535,"sku":"FUV-1","price":419.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Baader_252520U_252520filter__03181.1682640252.1280.1280.jpg?v=1766554319"},{"product_id":"baader-fringe-killer-filter-2","title":"Baader Fringe Killer Filter 2\"","description":"\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003e2\" Baader Fringe Killer Filter\u003c\/h3\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003ePlaneoptically polished with Phantom Group Coating\u003c\/h4\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-125_200_6ff8b5d9-20f7-4313-b575-65316817cdfd.jpg?v=1766554397\" alt=\"Baader Fringe Killer\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eBaader Fringe Killer\u003c\/div\u003e\n\u003c\/div\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Fringe-Killer (Fringe = colour fringing) blocks unfocused light in the red part of the spectrum (IR) - but above all suppresses over 50% of the interfering stray light in the blue spectral range - without changing the colour impression of the image.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe most delicate details of lunar craters and planetary surfaces are much more visible!\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Baader Fringe-Killer Filter prevents unwanted colour fringes in both the blue spectral range and in the IR above 700 nm! The visual impact initially corresponds to a minus violet filter, as opposed to this but the image colour remains broadly balanced. In itself a contradiction in terms? It can only be implemented by applying modern DWDM plasma assisted coating technology, which allows the application of approximately 100 individual layers on a flat-optically polished face surface perfectly and reproducibly without compromising visual quality! This fine optical precision tool also allows inexpensive refractors to reach the promised imaging performance. The reduction of chromatic aberration corresponds to what is achieved by corrections-lens systems, which usually cost 20 times more.\u003c\/p\u003e\u003cdiv class=\"emptyClear\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; font-family: \" open sans sans-serif both rgb clear:=\"\" height:=\"\" font-size:=\"\" color:=\"\" background-color:=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_b70acc47-76e8-48e9-a025-e14ad64207be.jpg?v=1766554400\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_b70acc47-76e8-48e9-a025-e14ad64207be.jpg?v=1766554400\" width=\"150\" height=\"144\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eExample of Sirius with and without the Fringe Killer\u003cbr style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_b70acc47-76e8-48e9-a025-e14ad64207be.jpg?v=1766554400\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eThe Baader Fringe Killer Overview\u003c\/h4\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eFACTS AND FIGURES\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eForms in the range between 450 to 480 nm with a plateau at around 50% transmission rate, the coating becomes more complex to produce than even the narrowest Nebula filters.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eAchieved in the passband the highest transmission rate of all previously available colour fringe, whether filter or correction lens. From 486-656 nm all relevant deep sky wavelengths are completely transmitted. Visually this is enough light for even high magnifications.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eBuilt-in IR-cut filter for the range 656-1150 nm; perfect for the CCD and Digital Camera-use in deep sky, moon or planets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_9daa3447-d325-42ad-81eb-6089c6fef5c0.jpg?v=1766554403\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_9daa3447-d325-42ad-81eb-6089c6fef5c0.jpg?v=1766554403\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eThe clearly visible colour correction of the Baader Fringe Killer. \u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_9daa3447-d325-42ad-81eb-6089c6fef5c0.jpg?v=1766554403\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eTHE HIGHLIGHTS OF THE BAADER FRINGE KILLER\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eProvides the brightest image of all industrially produced colour error correction systems. Thus the Fringe Killer is a must for even the smallest telescopes.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eCancels the devastating intensity of the disturbing purple fringing in a new form, which was never implemented to date in astronomical filters\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eEven weak nuances remain clearly visible in the planet due to the excellent colour balance.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eIn conjunction with an RG-610 Red Filter produces a narrowband Ha-pass filter with an only 70 nm wide windows and 95% light transmission - at an incredibly low price!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eThe combination with the Neodymium Skyglow Filter (with Phantom-Group-Coating) results in a balanced, breathtaking contrast to the observation of fine lunar and planetary details.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003ePlaneoptically polished for perfect sharpness, even when the filter is assembled well before the focal point (or binocular digital camera insert).\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eNo deterioration of resolution with high magnification - as would happen with flame-polished (raw polished) glass, commonly used for all sorts of filters!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eHight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. Almost 50 layers on either side, carefully positioned as not to impair the optical quality of the substrate surface\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eMakes the performance of a simple f\/8 economy refractor look like a classic f\/15 Fraunhofer achromat. See it to believe it!\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013474119791,"sku":"FFK-2","price":167.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FFR__93362.jpg?v=1766554405"},{"product_id":"baader-fringe-killer-filter-1-25","title":"Baader Fringe Killer Filter 1.25\"","description":"\u003ch3 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.5em; color: rgb(235, 2, 53); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003e1.25\" Baader Fringe Killer Filter\u003c\/h3\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003ePlaneoptically polished with Phantom Group Coating\u003c\/h4\u003e\u003cdiv class=\"leftImage\" style=\"box-sizing: border-box; margin: 0px 15px 1em 0px; padding: 0px; font-family: \" open sans sans-serif center top left rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-125_200_889b78ff-fcd8-47a9-8a04-a39c269d5ca1.jpg?v=1766557692\" alt=\"Baader Fringe Killer\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eBaader Fringe Killer\u003c\/div\u003e\n\u003c\/div\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Fringe-Killer (Fringe = colour fringing) blocks unfocused light in the red part of the spectrum (IR) - but above all suppresses over 50% of the interfering stray light in the blue spectral range - without changing the colour impression of the image.\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe most delicate details of lunar craters and planetary surfaces are much more visible!\u003c\/p\u003e\u003cp style=\"box-sizing: border-box; margin: 0px 0px 1.5em; padding: 0px; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003eThe Baader Fringe-Killer Filter prevents unwanted colour fringes in both the blue spectral range and in the IR above 700 nm! The visual impact initially corresponds to a minus violet filter, as opposed to this but the image colour remains broadly balanced. In itself a contradiction in terms? It can only be implemented by applying modern DWDM plasma assisted coating technology, which allows the application of approximately 100 individual layers on a flat-optically polished face surface perfectly and reproducibly without compromising visual quality! This fine optical precision tool also allows inexpensive refractors to reach the promised imaging performance. The reduction of chromatic aberration corresponds to what is achieved by corrections-lens systems, which usually cost 20 times more.\u003c\/p\u003e\u003cdiv class=\"emptyClear\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; font-family: \" open sans sans-serif both rgb clear:=\"\" height:=\"\" font-size:=\"\" color:=\"\" background-color:=\"\"\u003e\u003c\/div\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_944f0b2d-ec01-4ab1-bb48-bbd39d9b97b6.jpg?v=1766557695\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_944f0b2d-ec01-4ab1-bb48-bbd39d9b97b6.jpg?v=1766557695\" width=\"150\" height=\"144\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eExample of Sirius with and without the Fringe Killer\u003cbr style=\"box-sizing: border-box; margin: 0px; padding: 0px;\"\u003e\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f_killer_vergleich_sirius_944f0b2d-ec01-4ab1-bb48-bbd39d9b97b6.jpg?v=1766557695\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch4 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 1.2em; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed rgb line-height:=\"\" text-rendering:=\"\" background-color:=\"\"\u003eThe Baader Fringe Killer Overview\u003c\/h4\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eFACTS AND FIGURES\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eForms in the range between 450 to 480 nm with a plateau at around 50% transmission rate, the coating becomes more complex to produce than even the narrowest Nebula filters.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eAchieved in the passband the highest transmission rate of all previously available colour fringe, whether filter or correction lens. From 486-656 nm all relevant deep sky wavelengths are completely transmitted. Visually this is enough light for even high magnifications.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eBuilt-in IR-cut filter for the range 656-1150 nm; perfect for the CCD and Digital Camera-use in deep sky, moon or planets.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"rightImage\" style=\"box-sizing: border-box; margin: 0px 0px 1em 15px; padding: 0px; font-family: \" open sans sans-serif center top right rgb text-align:=\"\" vertical-align:=\"\" float:=\"\" clear:=\"\" color:=\"\" font-size:=\"\" background-color:=\"\" width:=\"\"\u003e\n\u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_fbe80ba2-cbb3-4052-b7e0-a9e9adf22668.jpg?v=1766557698\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_fbe80ba2-cbb3-4052-b7e0-a9e9adf22668.jpg?v=1766557698\" width=\"300\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; border: none; display: block;\"\u003e\u003c\/a\u003e\u003cdiv class=\"imageCaption\" style=\"box-sizing: border-box; margin: 0px; padding: 0.5em 0.5em 0px; clear: both; font-size: 0.846em;\"\u003eThe clearly visible colour correction of the Baader Fringe Killer. \u003ca class=\"image-popup\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fringe-killer-application_fbe80ba2-cbb3-4052-b7e0-a9e9adf22668.jpg?v=1766557698\" target=\"_blank\" style=\"box-sizing: border-box; margin: 0px; padding: 0px; touch-action: manipulation; color: rgb(235, 2, 53); text-decoration-line: none; transition: all 0.2s ease 0s;\"\u003eFor comparison please click\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003ch5 style=\"box-sizing: border-box; margin: 0px 0px 0.75em; padding: 0px; font-size: 13px; color: rgb(99, 99, 99); font-family: \" open sans sans-serif optimizespeed uppercase rgb line-height:=\"\" text-rendering:=\"\" text-transform:=\"\" background-color:=\"\"\u003eTHE HIGHLIGHTS OF THE BAADER FRINGE KILLER\u003c\/h5\u003e\u003cul style=\"box-sizing: border-box; margin: 0px 0px 1em; padding: 0px; list-style-position: initial; list-style-image: initial; font-family: \" open sans sans-serif rgb color:=\"\" font-size:=\"\" background-color:=\"\"\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eProvides the brightest image of all industrially produced colour error correction systems. Thus the Fringe Killer is a must for even the smallest telescopes.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eRemoves blue fringing as well as red fringing above 700nm.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eCancels the devastating intensity of the disturbing purple fringing in a new form, which was never implemented to date in astronomical filters\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eEven weak nuances remain clearly visible in the planet due to the excellent colour balance.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eIn conjunction with an RG-610 Red Filter produces a narrowband Ha-pass filter with an only 70 nm wide windows and 95% light transmission - at an incredibly low price!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eThe combination with the Neodymium Skyglow Filter (with Phantom-Group-Coating) results in a balanced, breathtaking contrast to the observation of fine lunar and planetary details.\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003ePlaneoptically polished for perfect sharpness, even when the filter is assembled well before the focal point (or binocular digital camera insert).\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eNo deterioration of resolution with high magnification - as would happen with flame-polished (raw polished) glass, commonly used for all sorts of filters!\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eHight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. Almost 50 layers on either side, carefully positioned as not to impair the optical quality of the substrate surface\u003c\/li\u003e\n\u003cli style=\"box-sizing: border-box; margin: 0.5em 0px 0px 1.5em; padding: 0px;\"\u003eMakes the performance of a simple f\/8 economy refractor look like a classic f\/15 Fraunhofer achromat. See it to believe it!\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013614170223,"sku":"FFK-1","price":129.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/FFR__96052.jpg?v=1766557700"},{"product_id":"baader-semi-apo-filter-2","title":"Baader Semi APO Filter 2\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\" padding:=\"\" margin-left:=\"\"\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eTwo filters made into one for maximum brightness\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eCombines Fringe-Killer with Moon \u0026amp; Skyglow for Semi-APO contrast with refractors\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eNon-aging sealed coating edges\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\"\u003eBaader's ideal solution for Achromat owners. The Semi-APO works like it's name implies - delivering a very neutral view, while cutting most of the annoying and contrast-robbing violet fringe that plagues all achromats. The Semi-APO filter combines a stronger Fringe Killer coating formula with the Moon\u0026amp;Skyglow Neodymium substrate. The result is similar performance to the Fringe Killer + Moon\u0026amp;Skyglow combination, but with a slightly stronger violet cut - and at an even greater $$ value.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe Semi-APO filter benefits from all the host of world-class Baader filter attributes. The Semi-APO filter is truly the world's most advanced 'minus-violet' type filter in every regard. It's high efficiency and neutral coloration make it practically disappear in use - while making most of the violet fringe disappear! The effects on sharpness, contrast, and aesthetics are remarkable, even with small refractors. The RGB enhancement of the Neodymium substrate actually boosts color contrasts, particularly for Jupiter and Mars.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eAs a side benefit, the Semi-APO filter has also proven to be the best Mars filter we've used - with ALL Telescopes, including large Dobsonians, SCTs, and Apochromats. The unique properties that result from the combination of the Fringe Killer's blue wavelength attenuation (attenuation - not total elimination), plus the selective Neodymium RGB passbands, result in a significant contrast enhancement of Martian features. The image retains its natural coloration and brightness, and the optically polished surfaces maintain every bit of the image sharpness, unlike other manufacturer's filters.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe high quality of Baader Planetarium filters permits their use well ahead of the focal plane with no image degradation (ie, for cameras or binoviewers). The inclusion of Baader's renowned UV\/IR Cut coatings on the Semi-APO eliminate UV and IR wavelengths to make it ideal for high-resolution imaging with Webcams, DSLR, and CCD cameras (see the UV\/IR Cut filter below, for more detail on these coatings). The high transmission and fringe reduction work great for both planetary and deep sky imaging.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44013683671151,"sku":"FSAPO-2","price":210.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/Semi_252520APO_2525202__88570.1682640796.1280.1280.jpg?v=1766559681"},{"product_id":"baader-semi-apo-filter-1-25","title":"Baader Semi APO Filter 1.25\"","description":"\u003cul style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\" padding:=\"\" margin-left:=\"\"\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eTwo filters made into one for maximum brightness\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eCombines Fringe-Killer with Moon \u0026amp; Skyglow for Semi-APO contrast with refractors\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; list-style: disc !important;\"\u003e\u003cspan color=\"#000120\" style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eNon-aging sealed coating edges\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent; margin-top: 0.9375rem; margin-bottom: 0.9375rem; font-family: \" libre franklin sans-serif font-size:=\"\"\u003eBaader's ideal solution for Achromat owners. The Semi-APO works like it's name implies - delivering a very neutral view, while cutting most of the annoying and contrast-robbing violet fringe that plagues all achromats. The Semi-APO filter combines a stronger Fringe Killer coating formula with the Moon\u0026amp;Skyglow Neodymium substrate. The result is similar performance to the Fringe Killer + Moon\u0026amp;Skyglow combination, but with a slightly stronger violet cut - and at an even greater $$ value.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe Semi-APO filter benefits from all the host of world-class Baader filter attributes. The Semi-APO filter is truly the world's most advanced 'minus-violet' type filter in every regard. It's high efficiency and neutral coloration make it practically disappear in use - while making most of the violet fringe disappear! The effects on sharpness, contrast, and aesthetics are remarkable, even with small refractors. The RGB enhancement of the Neodymium substrate actually boosts color contrasts, particularly for Jupiter and Mars.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eAs a side benefit, the Semi-APO filter has also proven to be the best Mars filter we've used - with ALL Telescopes, including large Dobsonians, SCTs, and Apochromats. The unique properties that result from the combination of the Fringe Killer's blue wavelength attenuation (attenuation - not total elimination), plus the selective Neodymium RGB passbands, result in a significant contrast enhancement of Martian features. The image retains its natural coloration and brightness, and the optically polished surfaces maintain every bit of the image sharpness, unlike other manufacturer's filters.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003eThe high quality of Baader Planetarium filters permits their use well ahead of the focal plane with no image degradation (ie, for cameras or binoviewers). The inclusion of Baader's renowned UV\/IR Cut coatings on the Semi-APO eliminate UV and IR wavelengths to make it ideal for high-resolution imaging with Webcams, DSLR, and CCD cameras (see the UV\/IR Cut filter below, for more detail on these coatings). The high transmission and fringe reduction work great for both planetary and deep sky imaging.\u003cbr style=\"box-sizing: inherit; -webkit-font-smoothing: antialiased; text-size-adjust: none; -webkit-tap-highlight-color: transparent;\"\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":44038681100399,"sku":"FSAPO-1","price":94.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/fsapo-1_11_2__08679.jpg?v=1767595370"}],"url":"https:\/\/ontariotelescope.com\/collections\/baader-visual-planetary.oembed","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}