14mm, 10.5mm, 7mm for sale individually. Excellent condition with clean, unmarked optics and original boxes.
$190 each includes postage. Sale Pending on 14mm, 7mm, 10.5mm
Five to seven lenses achieve a wide 65 degree apparent field of view. They all have a very long 20mm eye relief that give fully unvignetted views for those who must wear eyeglasses while observing. Rotating each eyepiece’s rubber eyecup raises and lowers it to the desired height to customize the eye relief to match your eyesight. They are threaded for standard light pollution and color filters. All are fully multicoated with Pentax’s proprietary Super Multi-Coatings (SMC) and have blackened lens edges for better contrast. All use ED (extra low dispersion glass) elements to minimize chromatic aberrations and astigmatism. They are usable for all types of observing, with all telescope types, and are corrected for use with focal ratios down to f/4. They have good contrast and excellent center to edge sharpness, with very little ghosting.
