[มือสอง] ขาย Celestron f/6.3 Reducer Corrector for C Series Telescopes

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Product Features
Reducer shortens the effective focal length of Schmidt-Cassegrain telescope optical system by 37%
Converts f/10 optical system to faster f/6.3 for a significantly wider field of view
Shortens exposure times for astrophotography by 2.5 times
Four-element, fully multi-coated optical design with 41mm clear aperture
threads into rear cell and works with any brand and size of Schmidt-Cassegrain telescope


http://www.celestron.com/