Summary: I had a 300 2.8 w/ a 1.4 tc on my 40D a couple of weekends ago and this thing worked great. I am an avid hobbyist and love this thing. At first I thought it might be too big for me but after using it for a while I could not imagine having anything else. I have it on a set of 055pro legs and love it.
Summary: I use the ball head on my Manfrotto 055XPROB with a D300. Makes changing the camera out extremely easy. I like the safety catch; works well. The size of the RC plate is larger than I thought it might be. I would have preferred that it not overlap the edge of the camera frame. The ball head is smooth and easy to adjust; fun to use.
Summary: I purchased this product only about a month ago and wouldn't go back to my old 3 handle adjusting top for anything! New to photography, I had no idea the difference a ballhead would make. This particular model is more than sturdy enough for my hobby to grow into. The quick release knobs are easy to access and adjust and the fluid movement of the ballhead feels sturdy and secure. The rotating base with the levels make panoramic shooting a dream.
Summary: Ok it's not a $400 Markins, however for my D200 and 300 AFS f/4 with TC it works very well. I've just upgrade to a set of 055FM3 legs and the system is very nice. I also use this ball head for my 90mm spotting scope and it does require a little extra care when you are viewing at the Zenith but it works for my 5 pound scope. Aim your current setup at 90 degrees and see how well it holds.
Pros: Feels secure, Fits Well, Improves Tripod Function, Not overly heavy, Quick Change is a Plus
Summary: I needed to replace my smaller Bogen ball head with a bigger one for macro photography. It supports my Nikon D200, with 105mm macro lens, R1 strobe system and a framerail system. The rapid connect plate is easy to use and very secure. The ballhead is very sturdy with individual controls for rotating the locked ballhead as well adjusting the ballhead itself. The only downside is that the ballhead is not as smooth as the other one that I own.
Summary: This Bogan Ball Head is a great buy for the small price you pay. I have bought several of these over the years and had very few problems. The only problem I have had is mainly due to my hard abuse on it. I have broke the ball one time and the quick release one time (this is over a several year period of daily hard use) but I fly with my gear regularly and it takes an unusual beating with all my metal stands. I will continue to buy this product for the future if needed.