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
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...
View full detailsOptolong UV/IR Cut Filter
5.0 / 5.0
1 Review
Blocks Ultraviolet (UV) and Infrared (IR) wavelengths Improves image sharpness and reduces star bloat Functions as a luminance (L) filter for mono...
View full detailsBaader 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...
View full detailsBaader 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...
View full detailsZWO 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" ...
View full detailsBaader BCF DSLR Astro Conversion Filter - for Canon EOS
5.0 / 5.0
1 Review
Replaces stock DSLR filter to dramatically increase H-alpha sensitivity Enables detailed imaging of emission nebulae Designed for a wide range of ...
View full detailsBaader Semi-APO Filter
Reduces chromatic aberration in achromatic refractors Enhances contrast on the Moon, planets, and bright stars Improves star sharpness by tighteni...
View full detailsBaader Clear Focusing Filter
5.0 / 5.0
1 Review
Enables precise focusing for dim narrowband filters Perfectly parfocal with other Baader Planetarium filters Optically polished to ensure no image...
View full detailsSVBONY 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...
View full detailsAntlia 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...
View full detailsZWO 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...
View full detailsOptolong 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...
View full detailsPlayer 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...
View full detailsPlayer 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...
View full detailsZWO 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...
View full detailsIDAS 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...
View full detailsIDAS 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...
View full detailsOptolong 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...
View full detailsDaystar 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...
View full detailsPlayer 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...
View full detailsPlayer 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...
View full detailsPlayer 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...
View full detailsBaader 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 ...
View full detailsBaader 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...
View full detailsWhat 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.