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UV/IR, Clear & Specialty Filters

These are the quiet workhorse filters of astrophotography. A UV/IR cut filter stops ultraviolet and infrared light that most refractors cannot focus with visible light, so stars stay tight. An IR pass filter does the opposite, letting only infrared through to cut atmospheric turbulence on the Moon and planets. Clear filters and protective windows keep dust off the sensor and preserve focus position when you swap filters.

We carry UV/IR cut, IR pass (685 and 850 nm), UV pass, clear, fringe-killer and DSLR conversion filters from Baader, ZWO, Player One, Optolong, Antlia, Chroma, SVBONY and Daystar.

Filters

Original price $29.00 USD - Original price $49.00 USD
Original price $29.00 USD
$26.00 USD - $44.00 USD
$26.00 USD - $44.00 USD
Current price $26.00 USD

ZWO UV/IR CUT Filter

Threads into standard 1.25" filter holders and nosepieces Blocks unwanted ultraviolet (UV) and infrared (IR) wavelengths Functions as a primary Lu...

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Original price $29.00 USD - Original price $49.00 USD
Original price $29.00 USD
$26.00 USD - $44.00 USD
$26.00 USD - $44.00 USD
Current price $26.00 USD
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Original price $44.00 USD - Original price $65.00 USD
Original price
$44.00 USD - $65.00 USD
$44.00 USD - $65.00 USD
Current price $44.00 USD

Optolong UV/IR Cut Filter

Blocks Ultraviolet (UV) and Infrared (IR) wavelengths Improves image sharpness and reduces star bloat Functions as a luminance (L) filter for mono...

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Original price $44.00 USD - Original price $65.00 USD
Original price
$44.00 USD - $65.00 USD
$44.00 USD - $65.00 USD
Current price $44.00 USD
Original price $87.00 USD - Original price $143.00 USD
Original price
$87.00 USD - $143.00 USD
$87.00 USD - $143.00 USD
Current price $87.00 USD

Baader UV/IR-CUT / L-Filter CMOS Optimized

Blocks unwanted UV and IR wavelengths for sharper stars Optimized for modern CMOS sensors to prevent star bloat Serves as a high-transmission Lumi...

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Original price $87.00 USD - Original price $143.00 USD
Original price
$87.00 USD - $143.00 USD
$87.00 USD - $143.00 USD
Current price $87.00 USD
Original price $110.00 USD - Original price $175.00 USD
Original price
$110.00 USD - $175.00 USD
$110.00 USD - $175.00 USD
Current price $110.00 USD

Baader IR-Pass Filter 685nm

685nm Infrared (IR) Pass Filter Transmits deep-red light starting from 670nm Dramatically reduces the image-blurring effects of atmospheric seeing...

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Original price $110.00 USD - Original price $175.00 USD
Original price
$110.00 USD - $175.00 USD
$110.00 USD - $175.00 USD
Current price $110.00 USD
Original price $29.00 USD
Original price $29.00 USD - Original price $29.00 USD
Original price $29.00 USD
Current price $26.00 USD
$26.00 USD - $26.00 USD
Current price $26.00 USD

ZWO IR 850nm Pass Filter – 1.25"

Passes Infrared Light > 850nm Dramatically Steadies Planetary Views in Poor Seeing Enables Daylight Planetary and Lunar Imaging Standard 1.25" ...

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Original price $29.00 USD
Original price $29.00 USD - Original price $29.00 USD
Original price $29.00 USD
Current price $26.00 USD
$26.00 USD - $26.00 USD
Current price $26.00 USD
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Original price $108.00 USD - Original price $108.00 USD
Original price
$108.00 USD
$108.00 USD - $108.00 USD
Current price $108.00 USD

Baader BCF DSLR Astro Conversion Filter - for Canon EOS

Replaces stock DSLR filter to dramatically increase H-alpha sensitivity Enables detailed imaging of emission nebulae Designed for a wide range of ...

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Original price $108.00 USD - Original price $108.00 USD
Original price
$108.00 USD
$108.00 USD - $108.00 USD
Current price $108.00 USD
Original price $106.00 USD - Original price $190.00 USD
Original price
$106.00 USD - $190.00 USD
$106.00 USD - $190.00 USD
Current price $106.00 USD

Baader Semi-APO Filter

Reduces chromatic aberration in achromatic refractors Enhances contrast on the Moon, planets, and bright stars Improves star sharpness by tighteni...

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Original price $106.00 USD - Original price $190.00 USD
Original price
$106.00 USD - $190.00 USD
$106.00 USD - $190.00 USD
Current price $106.00 USD
Original price $55.00 USD - Original price $155.00 USD
Original price
$55.00 USD - $155.00 USD
$55.00 USD - $155.00 USD
Current price $55.00 USD

Baader Clear Focusing Filter

Enables precise focusing for dim narrowband filters Perfectly parfocal with other Baader Planetarium filters Optically polished to ensure no image...

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Original price $55.00 USD - Original price $155.00 USD
Original price
$55.00 USD - $155.00 USD
$55.00 USD - $155.00 USD
Current price $55.00 USD
Original price $15.99 USD - Original price $17.99 USD
Original price
$15.99 USD - $17.99 USD
$15.99 USD - $17.99 USD
Current price $15.99 USD

SVBONY UV IR-Cut Filter

Blocks unwanted Ultraviolet (UV) and Infrared (IR) wavelengths Standard 1.25" or 2" filter threads (per variant) Improves image contrast and color...

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Original price $15.99 USD - Original price $17.99 USD
Original price
$15.99 USD - $17.99 USD
$15.99 USD - $17.99 USD
Current price $15.99 USD
Original price $39.00 USD - Original price $39.00 USD
Original price
$39.00 USD
$39.00 USD - $39.00 USD
Current price $39.00 USD

Antlia IR Pass 685nm Filter - 1.25"

Passes infrared light with wavelengths longer than 685nm Reduces the effect of atmospheric seeing for sharper planetary images Constructed from 2m...

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Original price $39.00 USD - Original price $39.00 USD
Original price
$39.00 USD
$39.00 USD - $39.00 USD
Current price $39.00 USD
Original price $19.00 USD - Original price $49.00 USD
Original price $19.00 USD
$17.00 USD - $44.00 USD
$17.00 USD - $44.00 USD
Current price $17.00 USD

ZWO AR Protective Window

Protects camera sensor from dust and humidity 21mm, 25mm and 60mm sizes for specific ZWO camera models High-transmission Anti-Reflection (AR) coat...

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Original price $19.00 USD - Original price $49.00 USD
Original price $19.00 USD
$17.00 USD - $44.00 USD
$17.00 USD - $44.00 USD
Current price $17.00 USD
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Original price $24.00 USD - Original price $30.00 USD
Original price
$24.00 USD - $30.00 USD
$24.00 USD - $30.00 USD
Current price $24.00 USD

Optolong Clear Focusing Filter

Achieve Critical Focus with Dim Stars Transmission >98.5% Across the Visible Spectrum λ/4 Transmitted Wavefront for Image Integrity 1.85mm B270...

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Original price $24.00 USD - Original price $30.00 USD
Original price
$24.00 USD - $30.00 USD
$24.00 USD - $30.00 USD
Current price $24.00 USD
Original price $22.00 USD - Original price $22.00 USD
Original price
$22.00 USD
$22.00 USD - $22.00 USD
Current price $22.00 USD

Player One UV/IR-Cut S-Series Filter - 1.25"

Corrects Color Balance for Color Cameras Blocks Unwanted Ultraviolet (UV) and Infrared (IR) Light Enhances Contrast for Lunar and Solar Imaging Hi...

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Original price $22.00 USD - Original price $22.00 USD
Original price
$22.00 USD
$22.00 USD - $22.00 USD
Current price $22.00 USD
Original price $59.00 USD - Original price $59.00 USD
Original price
$59.00 USD
$59.00 USD - $59.00 USD
Current price $59.00 USD

Player One UV/IR-Cut Anti-Halo Filter - 2"

Blocks unwanted Ultraviolet (UV) and Infrared (IR) wavelengths Features advanced anti-halo coatings to minimize reflections Standard 2" filter cel...

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Original price $59.00 USD - Original price $59.00 USD
Original price
$59.00 USD
$59.00 USD - $59.00 USD
Current price $59.00 USD
Original price $19.00 USD
Original price $19.00 USD - Original price $19.00 USD
Original price $19.00 USD
Current price $17.00 USD
$17.00 USD - $17.00 USD
Current price $17.00 USD

ZWO IR-Cut Protective Window

21 mm or 25 mm diameter protective window for select ZWO cameras Integrated UV/IR-Cut filter maintains natural color balance 1/4 λ surface flatnes...

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Original price $19.00 USD
Original price $19.00 USD - Original price $19.00 USD
Original price $19.00 USD
Current price $17.00 USD
$17.00 USD - $17.00 USD
Current price $17.00 USD
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Original price $108.00 USD - Original price $150.00 USD
Original price
$108.00 USD - $150.00 USD
$108.00 USD - $150.00 USD
Current price $108.00 USD

IDAS ODW Clear Optical Distance Filter

Clear filter that compensates for optical distance when swapped with another filter such as an IDAS NB2-PM or NB3-PM Available in 6 formats for te...

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Original price $108.00 USD - Original price $150.00 USD
Original price
$108.00 USD - $150.00 USD
$108.00 USD - $150.00 USD
Current price $108.00 USD
Original price $175.00 USD - Original price $248.00 USD
Original price
$175.00 USD - $248.00 USD
$175.00 USD - $248.00 USD
Current price $175.00 USD

IDAS HEUIB-II H-Alpha Enhanced UV/IR Cut Filter

Enhances H-alpha (656.3nm) transmission for nebula imaging Provides UV and near-IR suppression for one-shot color cameras Corrects color balance i...

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Original price $175.00 USD - Original price $248.00 USD
Original price
$175.00 USD - $248.00 USD
$175.00 USD - $248.00 USD
Current price $175.00 USD
Original price $79.00 USD - Original price $119.00 USD
Original price
$79.00 USD - $119.00 USD
$79.00 USD - $119.00 USD
Current price $79.00 USD

Optolong Night Sky H-Alpha IR Pass Filter

Passes Infrared Light >650nm Blocks Visible Light from 300-570nm Average Transmission >90% 1.85mm Thick Optical Glass Substrate λ/4 Transmit...

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Original price $79.00 USD - Original price $119.00 USD
Original price
$79.00 USD - $119.00 USD
$79.00 USD - $119.00 USD
Current price $79.00 USD
Original price $125.00 USD - Original price $125.00 USD
Original price
$125.00 USD
$125.00 USD - $125.00 USD
Current price $125.00 USD

Daystar 2" UV/IR Filter

2" Barrel Size Blocks Ultraviolet (UV) and Infrared (IR) Wavelengths Passes the Full Visible Spectrum Functions as an Essential Luminance (L) Filt...

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Original price $125.00 USD - Original price $125.00 USD
Original price
$125.00 USD
$125.00 USD - $125.00 USD
Current price $125.00 USD
Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD

Player One IR685nm IR-Pass Filter S-series - 1.25"

Passes infrared light with wavelengths greater than 685nm Standard 1.25" filter format for broad compatibility Significantly improves image stabil...

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Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD
Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD

Player One IR850nm IR-Pass Filter S-series - 1.25"

Passes Infrared Light at 850nm Standard 1.25" Filter Size Blocks Visible and Ultraviolet Light High-Quality Optical Glass Substrate Multi-Layer An...

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Original price $28.00 USD - Original price $28.00 USD
Original price
$28.00 USD
$28.00 USD - $28.00 USD
Current price $28.00 USD
Original price $149.00 USD - Original price $149.00 USD
Original price
$149.00 USD
$149.00 USD - $149.00 USD
Current price $149.00 USD

Player One UVenus UV-Pass Filter E-series - 1.25"

Reveals Cloud Detail on Venus UV-Pass Band Optimized for Planetary Imaging E-Series High-Quality Optical Glass Substrate 1.25" Mounted Filter Form...

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Original price $149.00 USD - Original price $149.00 USD
Original price
$149.00 USD
$149.00 USD - $149.00 USD
Current price $149.00 USD
Original price $77.00 USD - Original price $77.00 USD
Original price
$77.00 USD
$77.00 USD - $77.00 USD
Current price $77.00 USD

Baader Planetarium FCCT 2" Unmounted Clearglass Filter (Ø 47.4 mm)

2-inch (47.4 mm) unmounted clearglass filter Designed to be parfocal with other Baader narrowband filters CMOS-optimized anti-reflection coatings ...

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Original price $77.00 USD - Original price $77.00 USD
Original price
$77.00 USD
$77.00 USD - $77.00 USD
Current price $77.00 USD
Original price $91.00 USD - Original price $324.00 USD
Original price
$91.00 USD - $324.00 USD
$91.00 USD - $324.00 USD
Current price $91.00 USD

Baader Planetarium UV/IR-Cut / L-Filter – CMOS-optimized

Serves as a high-transmission Luminance (L) filter Provides complete Ultraviolet (UV) and Infrared (IR) blocking Engineered with CMOS-optimized an...

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Original price $91.00 USD - Original price $324.00 USD
Original price
$91.00 USD - $324.00 USD
$91.00 USD - $324.00 USD
Current price $91.00 USD

What Each Filter Does

  • UV/IR cut: Essential for colour cameras without a built-in IR filter, and for refractors that show bloated stars from unfocused infrared.
  • IR pass 685 and 850 nm: Infrared is less affected by seeing, so lunar and planetary detail improves on unsteady nights. Mono camera recommended.
  • UV pass (Venus): Shows the cloud patterns of Venus that are invisible in visible light.
  • Clear and protective windows: Keep focus consistent in a filter wheel slot and protect the sensor window.
  • Fringe killer and semi-APO: Reduce the violet halo of achromatic refractors for visual use and imaging.
  • DSLR conversion filters: Restore correct white balance and focus for modified DSLRs.

UV/IR and Specialty Filters: Frequently Asked Questions

Does my camera need a UV/IR cut filter?

Many astronomy colour cameras have only a clear window, so yes for broadband imaging. Check the camera's window type, or ask us.

Which IR pass filter is best for planets?

685 nm suits most targets and seeing conditions. 850 nm works on poor nights and for the Moon, at the cost of some resolution.

Not sure which filter you need?

Tell us your camera, telescope and what you want to improve. We will tell you which filter helps, if any.