Eyepiece SMC Pentax XF 11/4" Tube 8.5

9-98177
70531
9-98177
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Pentax XF 8.5 Eyepiece PENTAX XF eyepieces offer high-refraction, low-dispersion lanthanum glass elements to provide high-resolution images with minimal aberrations. Ideal for observation and photography of planets. PENTAX-original smc full-surface multi-layer lens coating improves light transmission efficiency. With JIS Class 4 weatherproof construction, the XF eyepieces are more durable and water resistant. Features: - Designed for use with PENTAX spotting scopes and telescopes - PENTAX-original smc full-surface multi-layer lens coating to improve light transmission efficiency - JIS Class 4 weatherproof construction makes these eyepieces more durable and water resistant - High-resolution, low-dispersion lanthanum glass elements to provide high-resolution images with minimal aberrations - Advanced computer simulation design technology was used to drastically reduce internal reflections producing brighter, clearer images Specifications: - OBJECTIVE LENS: 6 elements, 4 groups - 46X - APPARENT FIELD OF VIEW: 60 degrees - REAL FIELD OF VIEW: 1.3 degrees - FIELD OF VIEW AT 1000M: 22m - FIELD OF VIEW AT 1000Y: 66 ft. - EXIT PUPIL: 1.4mm - EYE RELIEF: 18mm - RELATIVE BRIGHTNESS: 1.9 - HEIGHT WIDTH: 3.3 - WEIGHT: 5.3 oz. (150g)