Nebula Filter CLS 2.0-inch flashlights but gives a reference of

but gives a reference of the exact field of view in degrees

and 1200x magnification

The design also puts the central focusing wheel close to the grips for subtle adjustments

Here is a helpful hint when it comes time to do that first alignment

and have large heads for easy adjustment even if you’re wearing gloves

Nebula Filter CLS 2.0-inch flashlights but gives a reference ofExplore Scientific Nebula Filter 1. 25" CLS Range from 436nm to 536nm with peak at 488nm. Transmission 98. 3% This is a general purpose light pollution reduction filter designed for observing the broad range of deep sky objects including nebulae and galaxies. The CLS does a good job of increasing contrast, providing a darker sky background.