Great spotter - OpticsPlanet Exclusive Celestron C90 Mak Spotting Scope w/ Tripod

I bought this spotting scope to fit my Canon EOS as a telephoto lens (t-ring adapter separate), and to take to the range to sight in my rifle scopes, and it does a fine job with both.
It's not as powerful as a $2K dedicated lens from Canon, but this lens is more versatile. As a telephoto lens is great. I have taken great shots of the moon, even at higher azimuth when it's farther from the horizon and appears smaller.
As a sports optic, it performs just as well as spotting scopes of similar price. The image clarity at average distances is much better than the average $150 spotter, and the whole thing is built very well. I've had no trouble with alignment even after many uses, as it is a solid piece that can tolerate a lot of handling and transportation. I am confident it will last a long time.
The eyepieces are also modular. I can use the 32 mm and 12.5 mm lenses that were included, and other 1.25" lenses that give higher mag are available. Fixed and variable magnification lenses are widely available.
The one concern I hear about from other customers is the quality. Most people have not factored in the intended use and typically give a lower rating because it did not meet the results you would expect from a high-density, competition grade scope. This scope has a wide range of capability for the price. For higher mag and image quality, there are many spotting scopes and telescopes available, but they are much more expensive and have a narrower range of use. You get a lot of quality and versatility for the price.
Be prepared to replace the included tripod with a higher quality one. The manufacturer makes tripods that actually match the quality of the scope, but get ready to shell out some dough when you upgrade. You get what you pay for.