Absolute must to replace the cheap spotting scopes on many telescopes - Celestron Star Pointer Finderscope 51630

This unit worked excellant and was easy to install. It has proven to be far superior to the factory sighting scope and it has enhanced my viewing pleasure. Some care must be taken in aligning it properly. I attached the unit with double stick tape and it has stayed aligned for years. Absolute must to replace the cheap spotting scopes on many telescopes.