12 of 13 people found the following review helpful
Nice, inexpensive upgrade,
This review is from: Orion 07212 9x50 Right-Angle Correct-Image Finder (Black) (Electronics)
This is a reasonably priced upgrade for the 6x30mm finder that came standard with my scope. The extra aperture provides much brighter views, the right-side up image simplifies matching the view to my star charts, and the right angle is a real neck-saver on long observing sessions.
Optically fine though there is some edge distortion. No problem for use as a finder, though. If you've never used a right angle finder before, be warned that initial orientation is little harder than with straight-through finders. I added a zero-power "bulls eye" finder to help with this. This combination makes finding things very easy.