Filters

Astronomik CLS Canon EOS XL Full Frame Clip Filter - CLS-EOSXL
- Filter Type: CLS/LPR
- Filter Size: EOS Full Frame Clip
- Filter Shape: EOS Clip
- Filter Insert Style: Clip-In

Optolong UHC Filter - 1.25" Mounted - UHC-125
- Filter Type: UHC
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong UHC Filter - 2" Mounted - UHC-200
- Filter Type: UHC
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong CLS Filter - 1.25" Mounted - CLS-125
- Filter Type: CLS/LPR
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong CLS Filter - 2" Mounted - CLS-200
- Filter Type: CLS/LPR
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong L-Pro Filter - 1.25" Mounted - LPRO-125
- Filter Type: UV/IR/Luminance
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong L-Pro Filter - 2" Mounted - LPRO-200
- Filter Type: UV/IR/Luminance
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong CLS-CCD Filter -1.25" Mounted - CLSCCD-125
- Filter Type: CLS/LPR
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong CLS-CCD Filter - 2" Mounted - CLSCCD-200
- Filter Type: CLS/LPR
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong OIII 25nm Filter - 1.25" Mounted - OIII-125
- Filter Type: OIII
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong 25nm OIII Filter - 2" Mounted - OIII-200
- Filter Type: OIII
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong OIII CCD 6.5nm Filter - 1.25" Mounted - OIIICCD65-125
- Filter Type: OIII
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong OIII CCD 6.5nm Filter - 2" Mounted - OIIICCD65-200
- Filter Type: OIII
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong SII CCD 12nm Filter - 1.25" Mounted - SIICCD12-125
- Filter Type: SII
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong SII CCD 6.5nm Filter - 1.25" Mounted - SIICCD65-125
- Filter Type: SII
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong SII CCD 6.5nm Filter - 2" Mounted - SIICCD65-200
- Filter Type: SII
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong H-Alpha 7nm CCD Filter - 1.25" Mounted - HAL7-125
- Filter Type: H-Alpha
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong H-Alpha 7nm CCD Filter - 2" Mounted - HAL7-200
- Filter Type: H-Alpha
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong LRGB CCD Filter Set - 1.25" Mounted - LRGB-125
- Filter Type: RGB
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong LRGB Filter Set - 2" Mounted - LRGB-200
- Filter Type: RGB
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong UBVRI Filter Set - 1.25" Mounted - UBVRI-125
- Filter Type: Photometric (UBVIR, Johnson-Cousins)
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong UBVRI Filter Set - 2" Mounted - UBVRI-200
- Filter Type: Photometric (UBVIR, Johnson-Cousins)
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong H-Beta 25nm Filter - 1.25" Mounted - HBTA25-125
- Filter Type: H-Beta
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong H-Beta 25nm Filter - 2" Mounted - HBTA25-200
- Filter Type: H-Beta
- Filter Size: 50.8 mm (2")
- Filter Shape: Round
- Filter Insert Style: Threaded

Optolong Moon SkyGlow Filter - 1.25" Mounted - MSG-125
- Filter Type: SkyGlow
- Filter Size: 31.75 mm (1.25")
- Filter Shape: Round
- Filter Insert Style: Threaded
One of the most crucial accessories of astro-imaging is filters. Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective filtration, increase definition and resolution, reduce irradiation and lessen eye fatigue. Different filters will act differently, highlighting a rainbow of wavelengths to enhance a variety of features in the night sky.
Deep-space imaging in particular benefits from filters. Far away celestial objects, such as nebulae come to life in your photos with vivid colors. We recommend starting out with an h-alpha filter to filter out broadband light pollution while only allowing a very narrow bandwidth of light to pass through. These are a favorite filter among astrophotographers!
We offer deep sky filters and planetary filters from Lumicon, Baader Planetarium, Celestron, TeleVue, Meade, Orion, High Point & Thousand Oaks. Telescope filters will add to the performance of virtually any telescope and are a highly recommended telescope accessory. Feel free to contact one of our telescope experts for advice on selecting the filter assortment that is right for you.