Explore Scientific 40mm 52° Argon-Purged Waterproof Eyepiece

Experience the extraordinary for the cost of a Plossl with Explore Scientific's 40mm 52° Series Eyepiece! This 40mm eyepiece allows you to see planets appear brighter, star clusters appear sharp, and nebulae details pop. That's the beauty of the 52° Series Eyepieces. EMD coatings to expose faint, deep-sky objects with bright clarity against a dark sky. The flat field even at the edge makes the 40mm eyepiece excellent for averted viewing, which is crucial when observing dim deep-sky objects such as nebulae.

The 2" barrel makes the 40mm eyepiece compatible with many drawtubes and accessories. The textured barrel offers slip-resistant grip, even when wearing gloves.

This Explore Scientific eyepiece features an argon-purged, waterproof exterior that protects internal elements from moisture. In fact, internal elements will remain as pristine as the day they were assembled. This also makes cleaning the 40mm 52° eyepiece effortless. There is no risk of cleaning solution migrating from the top of the lens and seeping around edges to be trapped in between elements.