Optolong L-eNhance Filter

Yes, the Optolong L-eNhance is a standard 2-inch round filter designed to thread into most 2-inch eyepiece holders, filter wheels, or camera adapters.

No, this is a dual-bandpass filter specifically designed for emission nebulae. It isolates H-alpha, H-beta, and OIII wavelengths, meaning it will block most of the light emitted by broadband objects like galaxies and star clusters.

The filter significantly increases contrast by blocking common artificial light sources like sodium and mercury vapor lamps. While it won't replace a dark-sky site, it allows you to capture nebula details that would otherwise be completely washed out by urban skyglow.

This filter is highly effective with both one-shot color (OSC) cameras and monochrome cameras. It is particularly popular for color camera users because it allows you to capture specific nebula emission lines in a single exposure.

The 1.85mm thickness is standard for 2-inch filters and should not cause significant issues with your focus travel. However, you will need to re-focus your telescope after installing the filter, as any glass element in the optical path can cause a slight shift.