WHAT A BEAST! This lens is huge....my current tripod and head cannot handle this combo. MyRRS ballhead doesn't ship till July 8 and I just ordered a Gitzo 1348. Seems I can handhold for 3-4 shots, then try to rest on my chest. It focuses extremely fast and the few test photos I took looked really good. To other owners of this lens, do you carry it separately in it's own case or put it in your camera bag(?) when not attached to camera body? If you do put in in your camera bag, what bag is it? I have a LowePro Nature Trekker AW. Now, this lens will fit down the center of the bag, but how do I fit the other lenses and body in there? I usually take along the Nikon 70-200VR, Nikon 12-24 and Sigma 150 macro and the SB800 flash. I'm going to have a few different configurations, for sure.