70° apparent field of view five elements, in three or four groups blackened lens edges and an effective baffle system for high-contrast images full wide-band multi-coating parfocal within the series steplessly adjustable eyecups
Optical quality - exceptional sharpness eyecup can be screwed out - even suitable for spectacle wearers Focal length 21.5 mm to 7.2 mm - step-less magnification Contrast Power - stray light baffles field of view of 40° to 53° multi-coating on all air/glass surfaces 15mm of eye relief 1.25 inch barrel diameter
Two elements out of the 6 optical elements are made of ED (Extra-low Dispersion) glass elements to provide excellent sharpness edge-to-edge, low level of chromatic aberration and very well managed astigmatism, making this eyepiece a real competitor to much more expensive eyepieces.
FOV of 82 Degrees Features a built-in, soft rubber eyecup which extends by rotating an external collar The comfortable eye relief on all models and suitable for spectacle wearers All models are fully broadband multi-coated for high contrast and maximum light transmission
1.25" 10 mm focal length wide 70 degree apparent field of view 5 lens elements Fully multi-coated lenses and blackened lens edges for sharp, high contrast views 10 mm eye relief respectively, and fold down rubber eyeguard for comfortable and adjustable viewing Threaded for standard 1.25" astronomy filters Lightweight for easy telescope balancing