Skip to content
Find great gear for everyone on your list in our Holiday Gift Guide!
Check out our Holiday Gift Guide!

Filters

Also Available on Amazon

  • Original price $ 19.99 - Original price $ 49.99
    Original price
    $ 19.99 - $ 49.99
    $ 19.99 - $ 49.99
    Current price $ 19.99

    Sun Catcher Variable Large Aperture Solar Filter

    Explore Scientific

    If you need a Sun Catcher Solar Filter for 10-inch and 12-inch Dobsonian telescopes, purchase SC14-00. Cassiopeia Observatory Review - Click Here...

    View full details
    Original price $ 19.99 - Original price $ 49.99
    Original price
    $ 19.99 - $ 49.99
    $ 19.99 - $ 49.99
    Current price $ 19.99
  • Nebula Filter CLS 2.0-inch
    Original price $ 119.99 - Original price $ 119.99
    Original price
    $ 119.99
    $ 119.99 - $ 119.99
    Current price $ 119.99

    Nebula Filter CLS 2.0-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" CLS Range from 436nm to 536nm with peak at 488nm. Transmission 98.3% This is a general-purpose light-pollut...

    View full details
    Original price $ 119.99 - Original price $ 119.99
    Original price
    $ 119.99
    $ 119.99 - $ 119.99
    Current price $ 119.99
  • Nebula Filter Oxygen III 2.0-inch
    Original price $ 139.99 - Original price $ 139.99
    Original price
    $ 139.99
    $ 139.99 - $ 139.99
    Current price $ 139.99

    Nebula Filter Oxygen III 2.0-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" O-III Range from 483nm to 511nm with peak at 496nm. Transmission 96.7% Oxygen III - This is the highest cont...

    View full details
    Original price $ 139.99 - Original price $ 139.99
    Original price
    $ 139.99
    $ 139.99 - $ 139.99
    Current price $ 139.99
  • Nebula Filter UHC 1.25-inch
    Original price $ 109.99 - Original price $ 109.99
    Original price
    $ 109.99
    $ 109.99 - $ 109.99
    Current price $ 109.99

    Nebula Filter UHC 1.25-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" UHC Range from 458nm to 508nm with peak at 488nm. Transmission 96.7% UHC - This is an ultra-high contrast na...

    View full details
    Original price $ 109.99 - Original price $ 109.99
    Original price
    $ 109.99
    $ 109.99 - $ 109.99
    Current price $ 109.99
  • Nebula Filter Oxygen III 1.25-inch
    Original price $ 109.99 - Original price $ 109.99
    Original price
    $ 109.99
    $ 109.99 - $ 109.99
    Current price $ 109.99

    Nebula Filter Oxygen III 1.25-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" O-III Range from 483nm to 511nm with peak at 496nm. Transmission 96.7% Oxygen III - This is the highest cont...

    View full details
    Original price $ 109.99 - Original price $ 109.99
    Original price
    $ 109.99
    $ 109.99 - $ 109.99
    Current price $ 109.99
  • Nebula Filter H-Beta 1.25-inch
    Original price $ 129.99 - Original price $ 129.99
    Original price
    $ 129.99
    $ 129.99 - $ 129.99
    Current price $ 129.99

    Nebula Filter H-Beta 1.25-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" H-Beta Range from 478nm to 496nm with peak at 489nm. Transmission 94.5% H-Beta - Hydrogen is the most abunda...

    View full details
    Original price $ 129.99 - Original price $ 129.99
    Original price
    $ 129.99
    $ 129.99 - $ 129.99
    Current price $ 129.99
  • Neutral Density Filter 1.25" ND 0.9
    Original price $ 49.99 - Original price $ 49.99
    Original price
    $ 49.99
    $ 49.99 - $ 49.99
    Current price $ 49.99

    Neutral Density Filter 1.25" ND 0.9

    Explore Scientific

    The neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradi...

    View full details
    Original price $ 49.99 - Original price $ 49.99
    Original price
    $ 49.99
    $ 49.99 - $ 49.99
    Current price $ 49.99
  • Nebula Filter H-Beta 2.0-inch
    Original price $ 179.99 - Original price $ 179.99
    Original price
    $ 179.99
    $ 179.99 - $ 179.99
    Current price $ 179.99

    Nebula Filter H-Beta 2.0-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" H-Beta Range from 478nm to 496nm with peak at 489nm. Transmission 94.5% H-Beta - Hydrogen is the most abunda...

    View full details
    Original price $ 179.99 - Original price $ 179.99
    Original price
    $ 179.99
    $ 179.99 - $ 179.99
    Current price $ 179.99
  • Nebula Filter CLS 1.25-inch
    Original price $ 109.99 - Original price $ 109.99
    Original price
    $ 109.99
    $ 109.99 - $ 109.99
    Current price $ 109.99

    Nebula Filter CLS 1.25-inch

    Explore Scientific

    Explore Scientific Nebula Filter 1.25" CLS Range from 436nm to 536nm with peak at 488nm. Transmission 98.3% This is a general-purpose light-polluti...

    View full details
    Original price $ 109.99 - Original price $ 109.99
    Original price
    $ 109.99
    $ 109.99 - $ 109.99
    Current price $ 109.99
  • Explore Scientific 2" Variable Polarizing Filter
    Original price $ 169.99 - Original price $ 169.99
    Original price
    $ 169.99
    $ 169.99 - $ 169.99
    Current price $ 169.99

    Explore Scientific 2" Variable Polarizing Filter

    Explore Scientific

    Features Variable polarizing filter Individually adjustable image brightness Made from highly parallel optical glass Black anodized aluminum hous...

    View full details
    Original price $ 169.99 - Original price $ 169.99
    Original price
    $ 169.99
    $ 169.99 - $ 169.99
    Current price $ 169.99
  • OPTOLONG 2" L-eXtreme Deep-Sky Light Pollution Filter
    Original price $ 309.00 - Original price $ 309.00
    Original price
    $ 309.00
    $ 309.00 - $ 309.00
    Current price $ 309.00

    OPTOLONG 2" L-eXtreme Deep-Sky Light Pollution Filter

    Optolong

    The L-eXtreme is a two-band filter and the ideal choice for strong suppression of light pollution. It enables astrophotos of objects with narrow-ba...

    View full details
    Original price $ 309.00 - Original price $ 309.00
    Original price
    $ 309.00
    $ 309.00 - $ 309.00
    Current price $ 309.00
  • Explore Scientific Dark-Sky Filter 77mm Slim
    Original price $ 149.99 - Original price $ 149.99
    Original price
    $ 149.99
    $ 149.99 - $ 149.99
    Current price $ 149.99

    Explore Scientific Dark-Sky Filter 77mm Slim

    Explore Scientific

    Features Dark-Sky filter Contrast increase in aurora & deep-sky photography Reduction of stray light from street lights, for example Wide-ang...

    View full details
    Original price $ 149.99 - Original price $ 149.99
    Original price
    $ 149.99
    $ 149.99 - $ 149.99
    Current price $ 149.99
  • Nebula Filter Oxygen III 1.25-inch 6.5nm
    Original price $ 158.99 - Original price $ 158.99
    Original price
    $ 158.99
    $ 158.99 - $ 158.99
    Current price $ 158.99

    Nebula Filter Oxygen III 1.25-inch 6.5nm

    Explore Scientific

    Features High quality Explore Scientific O-III filter Let only the oxygen emission lines "through" Absorbs all other emission lines Absorbs almo...

    View full details
    Original price $ 158.99 - Original price $ 158.99
    Original price
    $ 158.99
    $ 158.99 - $ 158.99
    Current price $ 158.99
  • Nebula Filter S-II 1.25-inch 12nm
    Original price $ 149.99 - Original price $ 149.99
    Original price
    $ 149.99
    $ 149.99 - $ 149.99
    Current price $ 149.99

    Nebula Filter S-II 1.25-inch 12nm

    Explore Scientific

    Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

    View full details
    Original price $ 149.99 - Original price $ 149.99
    Original price
    $ 149.99
    $ 149.99 - $ 149.99
    Current price $ 149.99
  • Nebula Filter S-II 1.25-inch 6.5nm
    Original price $ 158.99 - Original price $ 158.99
    Original price
    $ 158.99
    $ 158.99 - $ 158.99
    Current price $ 158.99

    Nebula Filter S-II 1.25-inch 6.5nm

    Explore Scientific

    Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

    View full details
    Original price $ 158.99 - Original price $ 158.99
    Original price
    $ 158.99
    $ 158.99 - $ 158.99
    Current price $ 158.99
  • Nebula Filter H-Alpha 1.25-inch 12nm
    Original price $ 158.99 - Original price $ 158.99
    Original price
    $ 158.99
    $ 158.99 - $ 158.99
    Current price $ 158.99

    Nebula Filter H-Alpha 1.25-inch 12nm

    Explore Scientific

    Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

    View full details
    Original price $ 158.99 - Original price $ 158.99
    Original price
    $ 158.99
    $ 158.99 - $ 158.99
    Current price $ 158.99
  • Nebula Filter H-Alpha 1.25-inch 7nm
    Original price $ 174.99 - Original price $ 174.99
    Original price
    $ 174.99
    $ 174.99 - $ 174.99
    Current price $ 174.99

    Nebula Filter H-Alpha 1.25-inch 7nm

    Explore Scientific

    Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

    View full details
    Original price $ 174.99 - Original price $ 174.99
    Original price
    $ 174.99
    $ 174.99 - $ 174.99
    Current price $ 174.99
  • Nebula Filter Oxygen III 2-inch 6.5nm
    Original price $ 249.99 - Original price $ 249.99
    Original price
    $ 249.99
    $ 249.99 - $ 249.99
    Current price $ 249.99

    Nebula Filter Oxygen III 2-inch 6.5nm

    Explore Scientific

    Features High quality Explore Scientific O-III filter Let only the oxygen emission lines "through" Absorbs all other emission lines Absorbs almo...

    View full details
    Original price $ 249.99 - Original price $ 249.99
    Original price
    $ 249.99
    $ 249.99 - $ 249.99
    Current price $ 249.99
  • Nebula Filter S-II 2-inch 12nm
    Original price $ 209.99 - Original price $ 209.99
    Original price
    $ 209.99
    $ 209.99 - $ 209.99
    Current price $ 209.99

    Nebula Filter S-II 2-inch 12nm

    Explore Scientific

    Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

    View full details
    Original price $ 209.99 - Original price $ 209.99
    Original price
    $ 209.99
    $ 209.99 - $ 209.99
    Current price $ 209.99
  • Nebula Filter S-II 2-inch 6.5nm
    Original price $ 249.99 - Original price $ 249.99
    Original price
    $ 249.99
    $ 249.99 - $ 249.99
    Current price $ 249.99

    Nebula Filter S-II 2-inch 6.5nm

    Explore Scientific

    Features High quality Explore Scientific S-II filter Absorbs all other emission lines Absorbs almost all of the artificial light Passband bandwid...

    View full details
    Original price $ 249.99 - Original price $ 249.99
    Original price
    $ 249.99
    $ 249.99 - $ 249.99
    Current price $ 249.99
  • Nebula Filter H-Alpha 2-inch 12nm
    Original price $ 198.99 - Original price $ 198.99
    Original price
    $ 198.99
    $ 198.99 - $ 198.99
    Current price $ 198.99

    Nebula Filter H-Alpha 2-inch 12nm

    Explore Scientific

    Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

    View full details
    Original price $ 198.99 - Original price $ 198.99
    Original price
    $ 198.99
    $ 198.99 - $ 198.99
    Current price $ 198.99
  • Nebula Filter H-Alpha 2-inch 7nm
    Original price $ 258.99 - Original price $ 258.99
    Original price
    $ 258.99
    $ 258.99 - $ 258.99
    Current price $ 258.99

    Nebula Filter H-Alpha 2-inch 7nm

    Explore Scientific

    Features High quality Explore Scientific H-Alpha filter Lets only the emission lines of hydrogen "through" Absorbs almost all of the artificial l...

    View full details
    Original price $ 258.99 - Original price $ 258.99
    Original price
    $ 258.99
    $ 258.99 - $ 258.99
    Current price $ 258.99
  • Bresser Single Polarizing Filter 1.25"
    Original price $ 49.99 - Original price $ 49.99
    Original price
    $ 49.99
    $ 49.99 - $ 49.99
    Current price $ 49.99

    Bresser Single Polarizing Filter 1.25"

    Bresser

    Features 1.25 "linear polarization filter Socket with 1.25 "filter thread Also suitable for Lunt Herschel wedges Description Simple linear 1.25...

    View full details
    Original price $ 49.99 - Original price $ 49.99
    Original price
    $ 49.99
    $ 49.99 - $ 49.99
    Current price $ 49.99
  • Original price $ 3.95 - Original price $ 3.95
    Original price
    $ 3.95
    $ 3.95 - $ 3.95
    Current price $ 3.95

    Solar Filter/Sun Shade for Galileoscope Refractor Telescope STEM Kit

    Explore Scientific

    Galileoscope Refractor Telescope STEM Kit - Click Here Features Lightweight Includes a sun shade Stronger than any other solar filter film on the...

    View full details
    Original price $ 3.95 - Original price $ 3.95
    Original price
    $ 3.95
    $ 3.95 - $ 3.95
    Current price $ 3.95
  • AstroZap Full Aperture Glass Solar Filter
    Original price $ 96.95 - Original price $ 260.95
    Original price
    $ 96.95 - $ 260.95
    $ 96.95 - $ 260.95
    Current price $ 96.95

    AstroZap Full Aperture Glass Solar Filter

    Astrozap

    Description These are safe full aperture (sometimes referred as clear aperture) solar filters. This means that it allows the most light possible i...

    View full details
    Original price $ 96.95 - Original price $ 260.95
    Original price
    $ 96.95 - $ 260.95
    $ 96.95 - $ 260.95
    Current price $ 96.95
  • AstroZap - Baader Solar Filters
    Original price $ 70.80 - Original price $ 180.00
    Original price
    $ 70.80 - $ 180.00
    $ 70.80 - $ 180.00
    Current price $ 70.80

    AstroZap - Baader Solar Filters

    Explore Scientific

    Features With AstroSolar™ the Sun appears in neutral white. Baader AstroSolar™ film Filter cell constructed from lightweight 18Ga. aluminum and p...

    View full details
    Original price $ 70.80 - Original price $ 180.00
    Original price
    $ 70.80 - $ 180.00
    $ 70.80 - $ 180.00
    Current price $ 70.80
  • OPTOLONG 1.25" L-eNhance Deep-Sky Light Pollution Filter
    Original price $ 179.00 - Original price $ 179.00
    Original price
    $ 179.00
    $ 179.00 - $ 179.00
    Current price $ 179.00

    OPTOLONG 1.25" L-eNhance Deep-Sky Light Pollution Filter

    Optolong

    The L-eNhance is a three-band filter and ideal for strong suppression of light pollution. It enables astrophotos of objects with narrow-band emissi...

    View full details
    Original price $ 179.00 - Original price $ 179.00
    Original price
    $ 179.00
    $ 179.00 - $ 179.00
    Current price $ 179.00
  • OPTOLONG 1.25" L-eXtreme Deep-Sky Light Pollution Filter
    Original price $ 239.00 - Original price $ 239.00
    Original price
    $ 239.00
    $ 239.00 - $ 239.00
    Current price $ 239.00

    OPTOLONG 1.25" L-eXtreme Deep-Sky Light Pollution Filter

    Optolong

    The L-eXtreme is a two-band filter and the ideal choice for strong suppression of light pollution. It enables astrophotos of objects with narrow-ba...

    View full details
    Original price $ 239.00 - Original price $ 239.00
    Original price
    $ 239.00
    $ 239.00 - $ 239.00
    Current price $ 239.00
  • OPTOLONG 2" L-eNhance Deep-Sky Light Pollution Filter
    Original price $ 229.00 - Original price $ 229.00
    Original price
    $ 229.00
    $ 229.00 - $ 229.00
    Current price $ 229.00

    OPTOLONG 2" L-eNhance Deep-Sky Light Pollution Filter

    Optolong

    The L-eNhance is a three-band filter and ideal for strong suppression of light pollution. It enables astrophotos of objects with narrow-band emissi...

    View full details
    Original price $ 229.00 - Original price $ 229.00
    Original price
    $ 229.00
    $ 229.00 - $ 229.00
    Current price $ 229.00
  • OPTOLONG 1.25" L-Pro Deep-Sky Light Pollution Filter
    Original price $ 149.00 - Original price $ 149.00
    Original price
    $ 149.00
    $ 149.00 - $ 149.00
    Current price $ 149.00

    OPTOLONG 1.25" L-Pro Deep-Sky Light Pollution Filter

    Optolong

    The L-Pro broadband filter is the ideal choice for suppressing light pollution from artificial light and enables astrophotos of broadband emission ...

    View full details
    Original price $ 149.00 - Original price $ 149.00
    Original price
    $ 149.00
    $ 149.00 - $ 149.00
    Current price $ 149.00
  • OPTOLONG 2" L-Pro Deep-Sky Light Pollution Filter
    Original price $ 199.00 - Original price $ 199.00
    Original price
    $ 199.00
    $ 199.00 - $ 199.00
    Current price $ 199.00

    OPTOLONG 2" L-Pro Deep-Sky Light Pollution Filter

    Optolong

    The L-Pro broadband filter is the ideal choice for suppressing light pollution from artificial light and enables astrophotos of broadband emission ...

    View full details
    Original price $ 199.00 - Original price $ 199.00
    Original price
    $ 199.00
    $ 199.00 - $ 199.00
    Current price $ 199.00
  • Neutral Density Filter 2" ND 0.9
    Sold out
    Original price $ 59.99 - Original price $ 59.99
    Original price
    $ 59.99
    $ 59.99 - $ 59.99
    Current price $ 59.99

    Neutral Density Filter 2" ND 0.9

    Explore Scientific

    The neutral density filter transmits light uniformly across the entire visual spectrum. It serves as an excellent filter to reduce glare and irradi...

    View full details
    Original price $ 59.99 - Original price $ 59.99
    Original price
    $ 59.99
    $ 59.99 - $ 59.99
    Current price $ 59.99
    Sold out
  • Nebula Filter UHC 2.0-inch
    Sold out
    Original price $ 139.99 - Original price $ 139.99
    Original price
    $ 139.99
    $ 139.99 - $ 139.99
    Current price $ 139.99

    Nebula Filter UHC 2.0-inch

    Explore Scientific

    Explore Scientific Nebula Filter 2.0" UHC Range from 458nm to 508nm with peak at 488nm. Transmission 96.7% UHC - This is an ultra-high contrast nar...

    View full details
    Original price $ 139.99 - Original price $ 139.99
    Original price
    $ 139.99
    $ 139.99 - $ 139.99
    Current price $ 139.99
    Sold out
  • AstroZap - Baader Solar Sheets
    Sold out
    Original price $ 33.60 - Original price $ 70.00
    Original price
    $ 33.60 - $ 70.00
    $ 33.60 - $ 70.00
    Current price $ 33.60

    AstroZap - Baader Solar Sheets

    Explore Scientific

    Description Make your own solar filter! Visual material includes instructions to build your own filter Baader Solar Material Size Choice: 177mm x...

    View full details
    Original price $ 33.60 - Original price $ 70.00
    Original price
    $ 33.60 - $ 70.00
    $ 33.60 - $ 70.00
    Current price $ 33.60
    Sold out
  • Explore Scientific 1.25" Variable Polarizing Filter
    Sold out
    Original price $ 58.99 - Original price $ 58.99
    Original price
    $ 58.99
    $ 58.99 - $ 58.99
    Current price $ 58.99

    Explore Scientific 1.25" Variable Polarizing Filter

    Explore Scientific

    Features Variable polarizing filter Individually adjustable image brightness Made from highly parallel optical glass Black anodized aluminum hous...

    View full details
    Original price $ 58.99 - Original price $ 58.99
    Original price
    $ 58.99
    $ 58.99 - $ 58.99
    Current price $ 58.99
    Sold out