Explore Scientific 68° Series 2" 40mm Waterproof Eyepiece

The 68° Series 40mm has the longest focal length in the line, with a 2" barrel and 6-element optics delivering the widest views the series offers. With a 68° field of view at 40mm, you are looking through an expansive window onto the sky. Generous eye relief keeps viewing comfortable even during long sessions. It has argon-purged waterproof construction and multi-element optics.

Key Features

• 2" barrel with 40mm focal length — the longest focal length in the series for maximum sky coverage
• 6-element optics — low-dispersion and high-refractive-index glasses produce sharp images across the full 68° field
• 68° apparent field of view — the widest framing in the 68° series
• Generous eye relief for relaxed, comfortable viewing during extended sessions, fully compatible with eyeglasses
• Argon-purged waterproof housing — sealed and fog-proof
• Multilayer deposition coatings on all air-to-glass surfaces with edge-blackened elements for contrast

Ideal For

• Maximum sky coverage — ideal for initial target location