Celestron Pro Zoom Spotting Scope's 60mm aperture makes it perfect for many uses - bird watching, photography, nature study, hunting, scenic observing -in fact, almost any type of terrestrial observing you're interested in. The carefully crafted, multi-coated optics used in Celestron 60 mm Pro-Zoom Spotting Scope 52200 excellent contrast and clarity, and the lens hood that comes standard reduces glare. Always looking to offer the most user-friendly optical instruments, Celestron made sure the zoom and focus controls on this 60mm ProZoom Spotting Scope are exceptionally smooth, convenient and easy to use. The ability to zoom from 15 to 60 power with speed, control and precision means you'll be able to focus on and follow interesting subjects with ease. An optional photo adapter turns 60mm-ProZoom Spotting Scope into a telephoto lens of 1000mm to 4000mm focal length. If your interest is in viewing on the go, Celestron 60mmProZoom Spotting Scope is highly portable at 49 ounces.