{"product_id":"zwo-d60-ar-protective-window","title":"ZWO D60 AR Protective Window","description":"\u003ch3\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eZWO D60 AR Protective Window\u003c\/strong\u003e is a \u003cstrong\u003e60 mm\u003c\/strong\u003e replacement window for ZWO's large-format cooled cameras. It is \u003cstrong\u003e2 mm\u003c\/strong\u003e thick, figured to \u003cstrong\u003e1\/4 λ flatness\u003c\/strong\u003e, and carries an \u003cstrong\u003eanti-reflective coating\u003c\/strong\u003e. It mounts directly in front of the sensor and seals the cooled sensor chamber against dust and humidity.\u003c\/p\u003e\n\u003cp\u003eAn AR window is optically clear — it reduces surface reflections but does \u003cstrong\u003enot\u003c\/strong\u003e block ultraviolet or infrared. That is deliberate on these bodies, and the reason is worth understanding before you order.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eWho It's For\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis is a good match if you own an \u003cstrong\u003eASI6200MM Pro, ASI2600MM Pro\/Duo, or ASI071MC Pro\u003c\/strong\u003e and need to replace a window that is scratched, fogged, or contaminated beyond cleaning.\u003c\/p\u003e\n\u003cp\u003eIf you run a \u003cstrong\u003emonochrome camera behind a filter wheel\u003c\/strong\u003e, this is the window you want and the one ZWO fits: your filters already control the passband, and an IR-cut coating at the sensor would only get in the way of narrowband and infrared work.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eKey Features \u0026amp; Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e60 mm diameter, 2 mm thick:\u003c\/strong\u003e the D60 form factor, sized for ZWO's APS-C and full-frame cooled bodies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnti-reflective coating:\u003c\/strong\u003e reduces reflection losses and internal glare at the window surfaces — worth having on a large sensor where bright-star halos are most visible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptically clear:\u003c\/strong\u003e passes UV and IR straight through, leaving all wavelength control to your filter wheel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\/4 λ flatness across 60 mm:\u003c\/strong\u003e holding that figure over this aperture is why the substrate is 2 mm rather than 1.1 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor-chamber seal:\u003c\/strong\u003e on a TEC-cooled camera this window is the barrier keeping humidity away from a sensor held well below ambient\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eRecommended Uses\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacing a scratched or contaminated window\u003c\/strong\u003e on an ASI6200MM Pro, ASI2600MM Pro\/Duo, or ASI071MC Pro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLRGB and narrowband monochrome imaging\u003c\/strong\u003e, where the filter wheel does the filtering and the window should stay neutral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhotometry and scientific imaging\u003c\/strong\u003e, where you want no unnecessary coating shaping the passband\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInfrared imaging\u003c\/strong\u003e, which an IR-cut window would defeat outright\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestoring the sensor-chamber seal\u003c\/strong\u003e on a cooled camera showing condensation or frosting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eCompatibility and Accessory Notes\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras shipped with this window:\u003c\/strong\u003e ASI6200MM Pro, ASI2600MM Pro\/Duo, and ASI071MC Pro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMono bodies take AR, colour bodies take IR-cut\u003c\/strong\u003e — with one exception. The ASI071MC Pro is a one-shot-colour camera that ZWO nonetheless fits with the AR window, so do not infer your window type from mono-versus-colour alone. Check the list\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWant IR-cut instead?\u003c\/strong\u003e Fit the D60 UV IR-Cut window — same diameter and thickness, different coating. That is the factory part on the ASI6200MC Pro, ASI2400MC Pro, and ASI2600MC Pro\/Duo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter is not interchangeable:\u003c\/strong\u003e D60 fits 60 mm bodies only. ASI1600 \/ ASI294 \/ ASI183 \/ ASI533 take the D32; smaller planetary bodies take the D21 or D25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo installation direction:\u003c\/strong\u003e ZWO confirms the window has no preferred orientation, so the coating works either way round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement procedure:\u003c\/strong\u003e see ZWO's official guide, \u003ca href=\"https:\/\/i.zwoastro.com\/wp-content\/uploads\/2025\/12\/c36da643469647ac8334179b49aa8b11.pdf\" target=\"_blank\" rel=\"noopener\"\u003eHow to Replace the Camera Protective Window\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical part only\u003c\/strong\u003e — no electronic function, no camera communication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eImportant Limitations\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis window does not cut UV or IR.\u003c\/strong\u003e ZWO states that plainly. On the ASI071MC Pro — a colour camera — that means you need a UV\/IR-cut filter in your imaging train, or infrared will focus at a different point than visible light and bloat your stars\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis is the highest-risk window in the range to replace yourself.\u003c\/strong\u003e These are cooled, desiccated cameras — opening the sensor chamber exposes a large sensor to dust and room humidity, and any moisture sealed inside will condense the moment the TEC runs. Check your desiccant before reassembling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot a threaded filter.\u003c\/strong\u003e It is a bare optical window that only works installed inside the camera body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits 60 mm bodies only.\u003c\/strong\u003e Check your camera against the list above before ordering\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold as a single window.\u003c\/strong\u003e No tools, gaskets, desiccant, or retaining ring included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhich cameras use the D60 AR window?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe ASI6200MM Pro, ASI2600MM Pro\/Duo, and ASI071MC Pro.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does a monochrome camera use an AR window instead of IR-cut?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eBecause a mono camera filters in the filter wheel. An IR-cut coating at the sensor would be redundant for LRGB work and would block narrowband and infrared imaging outright. Leaving the window neutral keeps every option open.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy ASI071MC Pro is a colour camera — why does it have the AR window?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt is the exception in the D60 range. ZWO fits it with the AR window, so if you image with it and want IR-cut behaviour, carry a UV\/IR-cut filter in your train.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the AR window and the UV IR-cut window?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe AR window is anti-reflective coated but optically clear and passes UV and IR. The UV IR-cut window blocks both. ZWO confirms the AR window does not cut UV.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the window have to face a particular direction?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. ZWO confirms there is no specific installation direction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is this window 2 mm thick when the D21 and D25 are 1.1 mm?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eHolding 1\/4 λ flatness across a 60 mm aperture takes a thicker substrate than across 21 mm. Thin glass at this diameter would not stay flat.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMy cooled camera is frosting up. Is the window the cause?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt can be, if the seal is compromised — but exhausted desiccant is the more common culprit. Check and bake or replace the desiccant before opening the sensor chamber.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this good for beginners?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eNo. Replacing a window on a large cooled camera is the least forgiving job in this range. If you are not equipped to work clean and manage desiccant, have it done.\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eBottom Line\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eIn short: a 60 mm × 2 mm anti-reflective window at 1\/4 λ flatness — the factory part for the ASI6200MM Pro, ASI2600MM Pro\/Duo, and ASI071MC Pro. It stays optically neutral so your filter wheel does the filtering. It does not cut UV or IR, which matters if you run the colour ASI071MC Pro.\u003c\/p\u003e","brand":"ZWO Optical","offers":[{"title":"Default Title","offer_id":53804505301103,"sku":"D60-2-AR","price":49.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0686\/0049\/6239\/files\/f8fc754efe2799ca917eee21d7350efd_f95065e3-4f07-47e6-b6c5-1ae4b917224b.jpg?v=1784083701","url":"https:\/\/ontariotelescope.com\/products\/zwo-d60-ar-protective-window","provider":"Ontario Telescope and Accessories","version":"1.0","type":"link"}