Optolong UHC Clip Filter for Canon EOS Full Frame Cameras

Optolong UHC Light Pollution Filter - Clip Filter for Canon EOS Full Frame Cameras

The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deep-sky objects, by selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (known as skyglow).

Together with the high transparency in main nebula emission lines at OIII (496 nm and 500 nm), H-beta (486 nm), NII (654 nm and 658 nm), H-alpha (656 nm) as well as SII (672 nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

Main Use and Performance

Suitable for color CCD/CMOS cameras and unmodified DSLRs

UHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.

UHC has a substantial red passband and offer superb photographic views for objects like the Orion Nebula (M42)

Light pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

WARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.

Coating Parameter

Multi-layers anti-reflection coating

Non-cementing optical substrate coating

Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL (central wavelength) no deviation affected by temperature change.

Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and optical density of off-band.

Compatibility

This filter is compatible with EOS 6D, EOS 5D (no LiveView), EOS 5D Mk II and EOS 5D Mk III.

The filter is not compatible with EOS 6D Mk II, EOS 5D Mk IV, EOS 5Ds, EOS 5Dsr and EOS 1Dx (all versions).

It is also not compatible with EOS Ra, EOS RP and EOS RP Astro.

Compatibility list Optolong clip filters

Not all Optolong clip filters are compatible with all cameras of the specified manufacturer and sensor format, therefore Optolong has compiled a list. You can download the PDF here.

Safety informations: PDF Download