Optolong L-Pro 1.25 Nebula Filter Laser Colli Mark III With a focal length of

With a focal length of 242 mm it has a very fast focal ratio of f/4

Weight: 22 oz (624 g)

These filters will fit most internally-threaded eyepiece barrels of 1

All models are constructed with 7 lens elements in 4 separate groups

Optolong L-Pro 1.25 Nebula Filter Laser Colli Mark III With a focal length ofOptolong L Pro 1. 25 Nebula Filter Blocks UV and IR (700 1100 nm) High transmission at passband Improved color balance for DSLRs and One Shot Color Astro Cameras, e. g. ASI Color Cameras cooled or uncooled by ZWO. High optical quality The L Pro Nebula filter permits roughly 3x longer exposure times than without a filter and therefore improves contrast significantly. L Pro Introduction Optolong L Pro (L Professional) filter is designed to improve the