| This economical Celestron 9 x 50mm straight-through finderscope is complete with a quick release mounting bracket. It is the same finderscope and bracket used on Celestron CPC-series telescopes. The finder provides images that are upside down and backwards, with the stars in the same patterns that you see on star charts when you rotate the chart 180° and hold it upside down. This makes it easy to starhop from object to object using the finder’s substantial 5.8° field of view.
The quick release bracket comes with hardware that will thread into the existing finderscope holes drilled at the 11 o’clock and 1 o’clock positions on the rear cell of any 8" to 14" Schmidt-Cassegrain telescope. The finder can also be used with many reflecting telescopes, but may require some drilling in the optical tube to install it. Two finger-tighten thumbscrews lock the finder back into precise collimation after the finder is removed from your scope for transport or storage and then reinstalled.
The bracket has an easy spring-loaded X-Y axis adjustment for collimating the finder crosshairs with the center of the main telescope’s field of view. A rubber O-ring holds the finder firmly in the front ring of the bracket while two finger-adjust thumbscrews in the rear ring adjust the collimation of the finder in conjunction with a spring-loaded third collimation screw.
The finder’s achromatic doublet lens is fully coated with antireflection materials for high light transmission and high contrast. It focuses by loosening the trim ring behind the fully-coated objective lens cell, screwing the lens cell in or out to focus for your particular eyesight, and tightening the trim ring to lock in the correct focus.
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