APM Ultra-Flat Field 18mm 8-element 65° eyepiece--1.25"

• 18mm focal length
• 
  65° field of view
• 
  20mm eye relief
• 
  Foldable rubber eyecup
• 
  8 elements in 5 groups
• 
  Blackened lens edges
• 
  21.7mm field stop
• 
  Fully multi-coated
• 
  1.25" filter threads
• 
  206g

The 1.25" 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 a 20mm eyerelief - also 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 1.25 "filters.