68° Series 20mm Waterproof Eyepiece neaf built-in dew shield

built-in dew shield

and star clusters

allowing you to easily use the “averted vision” technique to study faint details across a huge field-of-view

Field Stop Diameter 18

68° Series 20mm Waterproof Eyepiece neaf built-in dew shieldUsing 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 immersion