For anyone looking to take long range photos of pronghorn (or anything) check out the digiscoping section of Bird Forum. I've been browsing around over there for a couple weeks and it's one of the better digiscoping forums I've found. I should have some fancy new camera equipment soon to test out. I'll post the results of the test here so you guys don't waste all your money buying stuff that doesn't work (I'll have gotten that out of the way for you! :) If anyone knows of another good digiscoping forum please post the link below in the comments section.