Ra ER20 WA 18 mm Eyepiece by Levenhuk

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$177.48 / EA
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Wide-angle eyepiece. Focal length: 18 mm. Field of view: 68° WA in the Levenhuk Ra ER20 WA 18 mm Eyepiece model name stands for Wide-Angle, and the field of view of this model equals 68 degrees. This model will be especially useful for those who wear glasses, since it has a long eye relief of 0.8 inches and comes with a twist-up rubber eyecup. As with all other eyepieces in the Levenhuk Ra series, Levenhuk Ra ER20 WA 18 mm Eyepiece has a fully multi-coated optics and provides high-quality views. This eyepiece has a focal length of 0.7 inches and is lightweight due to an aluminum shell. Another good feature of this model is the possibility to attach it to almost every telescope with a focuser barrel diameter of 1.25'' or 2'' (using 1.25'' to 2'' adapter in the latter case). Focal length, in: 0.7 Eyepiece diameter, in: 1.2 Exit pupil diameter, in: 0.8 Barrel diameter: 1.25" Apparent field of view, °: 68 Optical design: 8 elements in 6 groups, fully multi-coated Shell: aluminum

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