porphyra parent
For something high quality, I have heard great things about the Kowa Prominar 500mm f/5.6 FL, which can either be used as a spotting scope or mounted to a camera as a lens. Apparently, the image quality is amazing, but then again it is also rather expensive (can be found on ebay for around $1000-1500 but retailed for more when new).
Kowa Prominar 500mm f/5.6 FL
Sure, and there are multiple choices for lenses like that, also telescopes to which a camera can be attached. It' the standard thing if you want large ranges and camera. But none of those are binoculars, which is what the OP was talking about.