100° 20mm Waterproof Eyepiece Focal Ratio_2. f/4.1 - f/6.5 Item Number 310175 Filter diameter

Item Number 310175 Filter diameter 1

Retical Polar Alignment Crosshair

75 and M48x0

but it is one of the most important when it comes to the stability and safety of your telescope system

100° 20mm Waterproof Eyepiece Focal Ratio_2. f/4.1 - f/6.5 Item Number 310175 Filter diameterThese eyepieces with their huge apparent field of view not only gave the observer a panoramic visual experience, but they relax the eye so the observer could pay attention to subtle details for extended periods. These ultra wide angle eyepieces played a critical role in the military for aiming at targets, and their long eye relief counterparts helped reduce eye injury from recoil. Each 100 Series Argon Purged Waterproof eyepiece is internally sealed