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Product Description
The Celestron 9x50 Right Angle Correct Image (RACI) Finder is a great upgrade to the standard finderscopes included with many Schmidt-Cassegrain telescopes. The generous 50mm aperture produces bright, sharp images with a magnification of 9x and a five-degree apparent field of view. Meanwhile, the right-angle, correct-image design keeps objects right-side-up and correctly oriented left-to-right, making it easier to find objects and track them as they drift through the field of view. You can rotate the eyepiece module left or right to find the perfect viewing angle based on your setup.
The double-crosshair reticle etched in the eyepiece makes it easy to center an object, whether you are aligning your computerized telescope or finding deep-sky objects on your own. The reticle can be focused separately from the finder itself.
The Celestron 9x50 RACI Finder comes with a sturdy bracket consisting of two rings and an integrated dovetail. The oversized thumbscrews make adjusting the finder's alignment easy. The dovetail allows for easy attachment to and removal from most Schmidt-Cassegrain and EdgeHD optical tube assemblies without affecting the finderscope's alignment. The eyepiece also features an attachment point for an aftermarket M8x1.25 thread-in illuminator.
Specifications
| Aperture: | 50mm (1.97") |
| Magnification: | 9x |
| Highest Useful Magnification: | 118x |
| Lowest Useful Magnification: | 7.14x |
| Limiting Stellar Magnitude: | 11 |
| Resolution (Rayleigh): | 2.79 arc seconds |
| Resolution (Dawes): | 2.32 arc seconds |
| Light Gathering Power (Compared to human eye): | 51x |
| Apparent Field of View: | 5° |
| Weight: | 24 oz (680 g) |
| External Length: | 191mm (7.5") |
| External Height: | 140mm (5.5") |