L-eNhance Optolong filter - The revolution of interference filters

Optolong has announced a new model of narrowband dual band filter, the L-eNhance!

The spread of urbanization and light pollution has become a growing problem for amateur astronomers and astrophotographers in recent years.
Current solutions to the problem can be very expensive and usually include the purchase of a monochromatic camera, different types of narrowband filters, and a filter wheel.

The L-eNhance filter is an economical and practical solution for all hobbyists.

Its dual bandwidth is designed for DSLR (reflex), color CMOS and monochrome CCD cameras.
The convenience and cost-effectiveness of this filter allows astrophotographers to photograph a rich selection of astronomical objects, even in heavily light-polluted areas.
We believe that the development of this new L-eNhance filter is a technical innovation compared to other filters on the market.

This filter effectively isolates the emission lines of nebulae in H-Alpha, H-Beta and OIII and achieves a maximum transmission of up to 90%.

The pass band cut is 10 nm.


The performance of this filter provides superb images with excellent light pollution control.

Recommended for: reducing light pollution, increasing emission nebula contrast, saving processing time