Optolong L-Pro Light Pollution Telescope Camera Filter – Sony-FF Clip

This is a Sony-FF clip filter for Sony Alpha full frame mirrorless cameras. It is confirmed to work with Mark I series Sony cameras (a7, a7r, a7s) but may not fit into newer generation Sony cameras.

About the OptolongL-Pro Light Pollution Filter

ThisL-Pro (L-Professional) 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 lights including mercury vapor lamps, both high and low-pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow).

Together with the highly transparent in main nebula emission lines at O-iii(496nm and 500nm), H-beta (486nm), N-ii(654nm and 658nm), H-alpha(656nm), as well as S-ii(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purposes from sub-rural areas with heavy light pollution.

Compare the L-Pro, L-eXtreme, and L-eNhance filter transmission lines:

Click on the Gallery tab thumbnail images to see the transmission lines in greater detail.

Unlike other light pollution filters (UHC and CLS,) L-Pro is a multi-bandpass filter offering excellent color balance by maximizing the transmission band. The balanced transmission allows astrophotos to be taken with minimal color cast to broadband emission objects such as galaxies, reflection nebulae, and globular star clusters. L-Pro is the best choice for light pollution suppression.

Main Use and Performance

Suitable for visual observation and astrophotography.

The L-Pro filter has a very low transmission reduction rate against continuous spectrum space objects and thus is quite effective in suppressing light pollution sources when shooting galaxies, reflection nebulae, and globular star clusters. The same holds true for visual star observations.

L-Pro filters alone can suppress infrared wavelengths, and thus can be used at ease for L image shooting with CCD cameras. Light pollution filters do not eliminate the effects of light pollution or increase the objects brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.

MANUFACTURER’S WARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER.

Packing

• Outer Box: silver box.
• Plastic Box: PP material.
• Lining: imported high-pressure white EVA material.

• Sony-FF clip filter for Sony Alpha full-frame mirrorless cameras. Confirmed to work with Mark I series Sony cameras (a7, a7r, a7s).
• May not fit into newer generation Sony cameras.
• Professional Version of Optolong’s Light Pollution Filter for Telescope Cameras.
• Designed to improve the visibility of various deep-sky objects.
• Suitable for visual observation and astrophotography.
• Enhances the contrast and details for both visual and photographic purposeseven with heavy light pollution.
• Multi-bandpass filterwith excellent color balance.
• Low transmission reduction rateagainst continuous spectrum space objects.
• Suppresses infrared wavelengths.