68° 34mm Waterproof Eyepiece Focus Masks Argon cools slower thereby buffering

Argon cools slower thereby buffering the effects of rapid temperature changes of the optics

it’s ready to view in the telescope’s eyepiece

These scopes’ robust

Top-Notch Performance and brightness

This process makes alignment as easy as 1-2-3: just center three bright objects in your eyepiece and press ALIGN

68° 34mm Waterproof Eyepiece Focus Masks Argon cools slower thereby bufferingFeatures Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 68 Series Argon Purged Waterproof extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics. The visual effect of these eyepieces with their long eye relief and their 68 apparent field is truly a full