52° 6.5mm Waterproof Eyepiece Discontinued 1¼” 60° Everbrite Diagonal has

1¼” 60° Everbrite Diagonal  has 99% reflection across the visual spectrum

This arrangement is used for terrestrial photography and short exposure lunar and planetary photography

10” (254 mm) Dobsonian-style Newtonian

Tested Under 1 Meter of Water for 30 Minutes Eyecup Removable Flip-Down Style Soft Silicone Rubber Lens Caps Slide-on Top and Bottom Materials Optical Glass

exotic Lanthanum elements

52° 6.5mm Waterproof Eyepiece Discontinued 1¼” 60° Everbrite Diagonal hasFeatures Using advanced computer design, combinations of low dispersion and high refractive index optical glasses, and durable multilayer deposition coatings, Explore Scientific 52 Series Argon Purged Waterproof eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics. The 52 Series eyepieces are par focal (meaning they focus at near the same point regardless of the focal length you select) and come