Explore Scientific engineered this 62° Series 40mm Eyepiece with a 5-elements in 3-groups lens configuration, anti-reflection fully multi-coated optics, and 28.2mm eye relief. This model of the 62° -series comes with a 2" diameter barrel that fits into common drawtubes, and accepts most eyepiece filters. The housing is argon-filled and O-ring sealed to be water and fog-proof, and has a textured ring on the exterior to give it a secure grip.
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