Optolong L-Pro 1.25 Nebula FilterOptolong 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

just adjust the set screw

Maintains the same back focus as when used at F/10: Unlike generic reducers the EdgeHD

while retaining a very pleasing color balance

durable frame for the filter glass

FOCAL RATIO: 10

Windows XP/Vista/Win7/Win8 (not RT)

25" Optical Tube Soft Case is constructed from 900 denier polyester for durability and weather resistance

All lens elements feature Sky-Watcher's proprietary Metallic High-Transmission Coatings™ (MHTC™) which are the finest photon anti-rejection coatings in their class

and PixInsight

not a red dot that can obscure your subject

The Bridge – On top of the controller

5x Barlow grabs your 2” eyepieces gently but firmly when you turn the oversized thumbscrew