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Фрагмент инструкции
They can be used in place of a Barlow lens for imaging applications. Extends the focal length of the R150S from 750mm to 1500mm (f/10) and the R130S from 720mm to 1440mm (f/11). Model # AV-TE-3631 Focal Reducer R130S/R150S Focal reducers shorten the effective focal length of telescopes to provide wider visual fields and faster f-ratios for astrophotography. This focal reducers is for astrophotography only. Shortens the focal length of the R150S from 750mm to 652mm (f/4.3) and the R130S from 720mm to 626mm (f/4.8). Model # AP-FR-3633 Visit or call us Mon. - Fri. from 9 a.m. - 5 p.m. ET: 845 469 8660 Copyright © 2002-2004 Vixen North America, 32 Elkay Dr., Chester, NY 10918. All rights reserved....
Эта инструкция также подходит к моделям:Оптические приборы - R130S (272.35 kb)