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Explore Scientific Filters

Explore Scientific telescope filters help astronomers improve contrast, suppress unwanted light and reveal more detail in the Moon, planets and deep-sky objects. Shop 1.25-inch and 2-inch astronomy filters in Canada, including UHC, OIII, CLS and H-Beta nebula filters, neutral-density Moon filters, and narrowband H-Alpha and SII filters for visual astronomy and astrophotography.

Not sure which telescope filter you need? Choose UHC or OIII for enhanced nebula contrast, CLS for broader light-pollution reduction, H-Beta for select emission nebulae, or a neutral-density filter for more comfortable lunar observing. Explore the collection and find the right Explore Scientific filter for your telescope, eyepiece or imaging setup.

16 products

Showing 1 - 16 of 16 products

Showing 1 - 16 of 16 products

Explore Scientific ND 0.9 neutral density filter showing the threaded metal cell and dark grey neutral glass

The neutral density filter standing beside its round hinged plastic storage case

Explore Scientific Explore Scientific 1.25-inch ND 0.9 Neutral Density Moon Filter with 13 Percent Transmission

$70.95 CAD

Neutral Density 0.9 2" Filter

Neutral Density 0.9 2" Filter

Explore Scientific Explore Scientific 2-inch ND 0.9 Neutral Density Moon Filter with 13 Percent Transmission

$73.67 CAD

Explore Scientific CLS light pollution filter in its round plastic storage case beside the retail packaging

Close view of the 1.25-inch CLS filter showing the threaded metal cell and the blue-green tint of the coated glass

Explore Scientific Explore Scientific 1.25-inch CLS Light Pollution Reduction Nebula Filter

$154.95 CAD

Explore Scientific 1.25-inch hydrogen-alpha 12nm narrowband nebula filter shown face on, the coated glass mounted in a black threaded cell

Angled view of the Explore Scientific 1.25-inch hydrogen-alpha 12nm nebula filter showing the cell and its 1.25-inch threads

Explore Scientific Explore Scientific 1.25-inch Hydrogen-Alpha 12nm Narrowband Nebula Filter

$225.95 CAD

CLS Fliter 2"

CLS Fliter 2"

Explore Scientific Explore Scientific 2-inch CLS Light Pollution Reduction Nebula Filter

$162.99 CAD

Explore Scientific 1.25-inch S-II 12nm narrowband nebula filter shown face on, the coated glass held in a black threaded metal cell

The Explore Scientific 1.25-inch S-II 12nm nebula filter viewed from another angle, showing the depth of the mounted cell and its filter threads

Explore Scientific Explore Scientific 1.25-inch Sulphur II 12nm Narrowband Nebula Filter

$225.95 CAD

UHC Filter 2"

UHC Filter 2"

Explore Scientific Explore Scientific 2-inch UHC Nebula Filter

$184.20 CAD

Oxygen III 2" Filter

Oxygen III 2" Filter

Explore Scientific Explore Scientific 2-inch Oxygen III (OIII) Nebula Filter

$184.20 CAD

Explore Scientific 77mm slim dark sky filter seen face on, showing the black anodised aluminium ring and the tinted neodymium glass

Explore Scientific Explore Scientific 77mm Slim Dark Sky Filter for Camera Lenses with 4mm Low Profile Mount

$253.95 CAD

Explore Scientific 1.25-inch S-II 6.5nm narrowband nebula filter seen face on, showing the coated glass in its black threaded cell

Angled view of the Explore Scientific 1.25-inch S-II 6.5nm nebula filter showing the mounted cell and its 1.25-inch filter threads

Explore Scientific Explore Scientific 1.25-inch Sulphur II 6.5nm Narrowband Nebula Filter

$281.95 CAD

H-Beta Filter 2"

H-Beta Filter 2"

Explore Scientific Explore Scientific 2-inch H-Beta Nebula Filter

$253.95 CAD

Explore Scientific 2-inch variable polarizing filter showing the black anodised aluminium two-part rotating cell

Second view of the 2-inch variable polarizing filter showing the threaded face and the dark polarising glass

Explore Scientific Explore Scientific 2-inch Variable Polarizing Filter with Continuously Adjustable Brightness

$253.95 CAD

Explore Scientific 2-inch hydrogen-alpha 12nm narrowband nebula filter shown face on, coated glass in a black threaded 2-inch cell

Angled view of the Explore Scientific 2-inch hydrogen-alpha 12nm nebula filter showing the cell and its 2-inch filter threads

Explore Scientific Explore Scientific 2-inch Hydrogen-Alpha 12nm Narrowband Nebula Filter

$352.95 CAD

Explore Scientific 2-inch S-II 12nm narrowband nebula filter shown face on, the coated glass held in a black threaded 2-inch cell

Angled view of the Explore Scientific 2-inch S-II 12nm nebula filter showing the depth of the cell and its 2-inch threads

Explore Scientific Explore Scientific 2-inch Sulphur II 12nm Narrowband Nebula Filter

$352.95 CAD

Explore Scientific 2-inch S-II 6.5nm narrowband nebula filter shown face on, coated glass in a black threaded 2-inch cell

Angled view of the Explore Scientific 2-inch S-II 6.5nm nebula filter showing the cell depth and its 2-inch filter threads

Explore Scientific Explore Scientific 2-inch Sulphur II 6.5nm Narrowband Nebula Filter

$422.95 CAD

Explore Scientific 2-inch hydrogen-alpha 7nm narrowband nebula filter shown face on, coated glass in a black threaded 2-inch cell

Angled view of the Explore Scientific 2-inch hydrogen-alpha 7nm nebula filter showing the cell and its 2-inch filter threads

Explore Scientific Explore Scientific 2-inch Hydrogen-Alpha 7nm Narrowband Nebula Filter

$422.95 CAD