Explore Scientific 52° Series 1.25" 6.5mm Waterproof Eyepiece

The 52° Series 6.5mm provides sharp, high-power views on nights of good seeing. It has argon-purged 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 for high-contrast images. The patented coating also suppresses reflections and ghosting.
• 6-element, 3-group optical design with edge-blackened elements to minimize stray light
• Fold-down silicone rubber eyecup for comfortable eye relief, including for eyeglass wearers. Its 15.9 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

• Planetary observers who want crisp detail on nights of good seeing
• Lunar explorers studying the Moon at high magnification
• Double stars and bright, compact deep-sky objects such as planetary nebulae and globular clusters
• 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 6.5mm gives 74x, a 1.1 mm exit pupil and a 0.70° true field.
• 6" Tabletop Dobsonian (760 mm, f/5). In the 6" f/5 Tabletop Dobsonian, through the 1.25" adapter of its 2" focuser, it gives 117x, a 1.3 mm exit pupil and a 0.44° true field.