Product no.: 33617Manufacturer: Baader
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The classic orthoscopic eyepiece has some advantages over popular Ploessl eyepieces of the same focal length, but especially compared to modern 'super-wide angle eyepieces':
Construction of an orthoscopic eyepiece: The optics consist of a plano-convex lens with a triplet, meaning there are only four air/glass surfaces. The interior is comprehensively blackened and effectively suppresses any stray light. In addition, the hard anodized barrel comes with an internal thread for taking filters.
How the Q-Barlow lens works - Screw the lens element into the barrel of the Barlow and you get 2.25 × the focal length. Alternatively, the lens element can be screwed directly into the filter thread of an eyepiece. This results in increasing the magnification by a factor of 1.3.
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