Optolong UHC Filter - EOS Full Frame Clip - EOSFF-UHC is no longer available.
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Optolong UHC Broadband Clip Filter for Canon EOS Full Frame Cameras
Optolong's UHC, or Ultra High Contrast, filter gives a bit more contrast than the CLS filter but works much the same way. This UHC filter works seamlessly with Canon EOS Full Frame cameras for high-contrast, crisp views. By minimizing the effects of artificial and natural light pollution, the background sky appears darker, increasing the visibility of your favorite celestial objects. Skyglow is typically caused by neutral oxygen in the atmosphere, light from high and low-pressure sodium vapor lights, or mercury vapor lamps. By suppressing skyglow at its sources, you can now view or image from areas of heavy light pollution.
Optolong’s UHC filter lets desirable wavelengths pass at a peak transmission of 95%, including emission lines at OIII, H-Beta, NII, H-Alpha, and SII. This filter also has a substantial red passband, so objects like the Orion Nebula look awesome!
The Optolong EOS Full Frame UHC Clip Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. Each filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved.
Using a Clip Filter on your Canon Full Frame Camera
- The Optolong EOS FF Clip filter can be inserted without tools; just use your fingers to insert or remove the filter. Once inserted correctly, it cannot unintentionally fall out.
- No changes to the housing of Canon EOS DSLR are required. All lens functions will work with the Clip installed, including focus, screen, and image stabilization,
- The Optolong clip filter prevents dust from settling on the sensor during long exposures.
- The EOS FF clip filters are compatible with EOS Full Frame series cameras, such as the 1D X, 5D, and 6D. If you have a standard APS-C EOS camera, Optolong offers clip filters for these cameras as well.
- Optolong Clip Filters do not function with the Canon EF-S series lenses. These lenses invade the space inside the camera body that would normally be taken up by the clip filter.
- To use EOS/T2 and 2” adapters to attach your camera to a telescope you’ll need to insert the Clip-Filter first and then install the desired lens adapters.
Quality Filter Materials:
- Schott B260 substrate material from Germany, 1.0mm thick
- CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
- Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
Optolong Filter Manufacturing Processes and Parameters
- Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
- Surface quality, according to MIL-O-13830, is 60/40
- 95% transmission of main nebula emission lines (i.e. H-alpha 656nm, OIII 496nm and 500nm, SII 672nm and H-beta 486nm
- 0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)
- Optolong’s planetary rotation system is a homogenous and precise coating procedure that ensures both high transmission of pass-band and optical density of off-band
- Each filter comes with a plastic case with high-pressure EVA case lining
Optolong is the Astronomy Filters division of Yulong Optics, an optical filter design, and processing company out of Kunming, China that has provided filters for over 700 optical companies since 1999. All Optolong filters pass European Union RoHS requirements and have been certified by TUV Rheinland and Bureau Veritas.
Optolong UHC Filter in Canon EOS Full Frame Clip Format
- Filter Case
Dimensions & Specifications
Filter Size: EOS Full Frame Clip
- Filter Type: Broadband Deep-Sky
- Filter Shape: EOS Clip
- Mounted or Unmounted: Mounted
We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.
Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.
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