Explore Scientific 52° Series 1.25" 10mm Waterproof Eyepiece

The 52° Series 10mm is a medium-high power focal length for planets and deep-sky objects, with sharp, flat-field views. It has waterproof construction and EMD coatings.

Key Features

• Argon-purged waterproof housing, sealed against moisture and fog. O-ring seals keep dirt, fungus and cleaning fluid from getting between the lenses.
• Enhanced Multi-Layer Deposition (EMD) coatings on all air-to-glass surfaces maximize contrast. The patented coating also suppresses reflections and ghosting.
• 6-element, 3-group optical design with edge-blackened elements to control scattered light
• Fold-down silicone rubber eyecup with comfortable eye relief, compatible with eyeglasses. Its 16.6 mm of eye relief is the distance at which your eye takes in the whole field.
• 1.25" barrel. Stainless steel, tapered for a more secure hold.
• Parfocal series. All 52° Series eyepieces focus at about the same point, so swaps need little refocusing.

Ideal For

• All-around observers who want a single eyepiece that handles planets and deep-sky objects well
• Fainter deep-sky objects that lack the brightness to show well at higher powers
• Stepping through magnifications until an object looks its best

Accessories & Compatibility

• ED80 (480 mm, f/6). In the Explore Scientific ED80, through the 1.25" adapter of its 2" diagonal, the 10mm gives 48x, a 1.7 mm exit pupil and a 1.1° true field.
• 10" Dobsonian (1270 mm, f/5). In the 10" f/5 Hybrid Truss Tube Dobsonian, through the 1.25" adapter of its 2" focuser, it gives 127x, a 2.0 mm exit pupil and a 0.41° true field.