82° 30mm Waterproof Eyepiece Filters they are highly recommended over

they are highly recommended over standard Barlows for 1¼" diagonals and refractors such as the Tele Vue-60

3 eyepieces offer 6 magnification choices with the addition of a focal extender

exposure time

All-new ergonomically designed dovetail clamping knobs

Integer gear ratios and permanently programmable Periodic Error Correction eliminates recurring track errors from the worm gear

82° 30mm Waterproof Eyepiece Filters they are highly recommended overFeatures Explore Ultra Wide Eyepieces Comfort, Quality, Value. Explore Scientific 82 Series eyepieces, with their 82 apparent field of view, immerses you in a very comfortable ultra wide field that naturally promotes relaxation at the eyepiece. When you relax your eyes and take in the scene presented before you, it is much easier to observe for longer periods of time, and details begin to materialize that may not have become apparent to you at first