Eyepiece Barrels: 1.25"/31.7mm Format. Focal lengths: 25mm, 10mm & 3.6mm. Apparent Field of view: 52 degrees (20mm and 10mm), 50 degrees (25mm and 4mm), 40 degrees (3.6mm). These Super Eyepieces incorporate a fold-down rubber eye-shield, fully coated optics and outstanding field correction.
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