APM Ultra-Flat Field 30mm 9-element 70° eyepiece--2"--a superb high-end eyepiece for a low price.
- 30mm focal length
70° field of view 22mm eye relief (18.5mm effective for glasses wearers) Foldable rubber eyecup 9 elements in 5 groups Blackened lens edges 36.3mm field stop Fully multi-coated 2" filter threads 54mm outside diameter 556g
The 2" UltraFlat Field Eyepiece features a high quality standard and a very compact design, which is designed to remove the field curvature at the edge, resulting in a flat, distortion-free image up to the edge of the visible field of view, even in very fast telescopes. The eyepiece has over - sized eyepiece lenses for the largest possible field of view and approximately a 20mm eyerelief - suitable for glasses wearers, the unfoldable eye-rubber allow a comfortable view. All lenses have a broad-band-multicoating (FMC) and blackened lens edges. The barrel is threaded for 2" filters.
|