Explore Scientific


Explore Scientific 40mm 68° 2-inch O.D. Argon-Purged Waterproof Eyepiece

The 40mm Explore Scientific 68° Series eyepiece is optimized to produce high contrast, high resolution, and superior flat field characteristics

The 68° Series eyepieces are parfocal and come with a removable and foldable soft silicone rubber eyecup that offers maximum comfort to your eyes, and as experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope.

  • 68° 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.
  • Wide exit pupil, long eye relief ensure comfortable long-duration observation through your telescope
  • Fold-down eyecup prevents peripheral light from leaking into your eye, causing blurring and dimming of the image
Focal length 40mm
Length 114.2mm
Width 80.3mm
Weight 998g; 35.2 oz.
Barrel Size/Type 2.00"
Eye Relief 31mm
Field Stop Diameter 45.5mm