Providing performance at a reasonable price for most beginners, the Explore Scientific 52° Series 40mm Eyepiece produces a very low power in most telescopes, and is a perfect addition to your observation arsenal.

Outfitted with a generous 52° apparent field of view, it employs a flat-field lens system that is treated with their proprietary Enhanced Multi-Layer Deposition (EMD) coatings to produce bright and clear views that are flat edge-to-edge. This lens design makes this eyepiece ideal for averted viewing techniques in which you view dim deep sky objects, such as wispy nebulae, indirectly using the portion of the eye that is most sensitive to light.

This model of the 52° series is offered here with a large 2" barrel that allows the maximum amount of light to pass through to the eye for a more comfortable observational experience with greatly reduced eyestrain and fatigue. The eyepiece is argon-filled and O-ring sealed to be waterproof against condensation and dew and resistant to fogging. A textured collar provides a slip-resistant grip, especially in cold weather or while wearing gloves. A fold down rubber eyecup makes it comfortable and easy to view through, with or without eyewear.

40mm Focal Length    52° Apparent Field of View    2" Diameter Barrel    Fully EMD Multi-Coated Optics    Argon-Filled, Water and Fogproof    Slip-Resistant Textured Surface    Fold-Down Eyecup

Related Questions and Answers

Q: 1. Will this work with an Evostar 72 APO refractor?

A: Yes, the Explore Scientific Field Flattener for f/5 to f/7 Refractors is compatible with the Sky-Watcher Evostar ED APO 72mm f/5.8 Refractor.

Q: 2. Will this fit the ES ted0806-01 80mm f6 APO?

A: The Explore Scientific Crayford Style Focuser for APO EDT Series Tmm f/elescopes (2") BH #EXFOCEDCRBN0 • MFR #FOCEDCRBN-01 should fit the ES 80mm f/6 APO

Q: 3. If it will fit a Sky-Watcher Evostar 72" telescope?

A: No, it will not. Designed for specific Explore Scientific telescopes.

Q: 4. Would this coma corrector work for an F/5.9 newtonian?

A: Yes, as long as your telescope accepts 2" eyepieces

Q: 5. Is there an adapter to fit the edge hd 9.25?

A: There is no adapter but you can use this Alpine focuser instead: https://bhpho.to/2H2Fnmp

Q: 6. The Sky-Watcher Evo 100ED and the Sky-Warcher 80ED both have Synta 96mm OT attachments for a focuser. Is this a 96mm focuser?

A: The Explore Scientific APO EDT Series Rack & Pinion Focuser (2") is not a 96" focuser.

Q: 7. Is there an adapter to fit this to an edge hd 9.25?

A: There is no adapter but you can use this Alpine focuser instead: https://bhpho.to/2H2Fnmp

Q: 8. does it fit the explore Scientific AR152?

A: No, the Explore Scientific Crayford Style Focuser for APO EDT Series Telescopes (2") will not fit the Explore Scientific AR152. This is a spare part or replacement for APO EDT series telescopes.

Q: 9. Can this be used on the Sky-Watcher Evo 100ED?

A: Yes this would be compatible with your Sky-Watcher EvoStar 100mm f/9 Doublet APO Refractor (OTA only).

Q: 10. Does this fit on Explore Scientific FirstLight 127mm f/15 Maksutov-Cassegrain Telescope ?

A: This will not work on the Scope you referenced.