Orders placed after 4PM on weekdays will not ship until the next business day. Orders placed after 12pm Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
The 2" diameter barrel 100°-Series 20mm Eyepiece from Explore Scientific is an ultra-wide field telescope eyepiece designed for planetary and deep-space observations. Its wide exit pupil makes this eyepiece ideal for comfortable viewing for extended periods. The contrast is enhanced by a fold-down rubber eyecup that prevents stray light from leaking into your eye. Anti-reflective multicoated optics ensures bright, high-contrast images with true color transmission across the entire wide field of view. The eyepiece features a textured surface for a sure-grip when changing it out, argon-filled body for water and fogproof performance when used in extreme temperatures and climates, and a double-tapered barrel for smooth insertion and removal from the focuser.
Ultra-wide 100° apparent field of view displays a broad image with minimal optical distortion, ideal for detailed observation
Images have true color transmission across the entire field of view, even as the observed object approaches the field stop.
Anti-reflective multicoated optics ensure bright, high contrast images
Wide exit pupil, long eye relief ensure comfortable long-duration observation through your telescope
Double-tapered barrel allows smooth insertion and removal from the telescope's eyepiece holder or diagonal
Fold-down eyecup prevents peripheral light from leaking into your eye, causing blurring and dimming of the image
In the Box
Explore Scientific 100°-Series 20mm Eyepiece (2")
Limited 1-Year USA Warranty, Extendable to Transferrable Lifetime Warranty with Registration