Summary: I first bought the Sony 70-300G. This is a very nice lens, but it does not come with a tripod collar. This makes it tough for my sort of nature photography. Anyway, I ordered the 70-400G when my wife was not looking, and I got it a few days later. When I opened the box, I was shocked at the weight of the lens. This lens is heavy! You will need a nice tripod to support this (if your shooting requires a tripod). Anyway, I took it out and shot some close up images with it.