Try contacting www.eagleoptics.com they have a 800 number and are extremely knowledgeable and run an honest operation. I personally use a Bausch and Lomb 15-45 x spotting scope and weightwise and power and clarity it was a heck of a good buy. A comparable scope would be the Nikon Owl spotter but it does not have phase corrected optics like the B&L does. I purchased it from Eagle Optics and it cost 345 w/o a tripod.