I just acquired this used off fleabay for my 400 2.8. I'd wanted some type of gimbal head for the monster but never wanted to pay new prices. Anyway it's here and It's bigger than I thought, heavier then I thought but WOW it really was just what I need to mate to that lens. I tried it out in the basement last night @ minimum focus distance low shutter speed 1/60 and it was smooth & stable.. Once It was balanced, not hard, a few ounces of pressure was all it took to put it where I want. Now I need a better tripod for travel. There are several different gimbal heads I was looking at, but used, cheap price, close to what I thought I needed won. It was not my 1st choice but I really like it.
I've kinda talked the wife into a fall road trip. Now where to go?