I have the 5D and recently purchased a 400DO. I've been using the 055PRO with the 322RC2 head and I'm not happy with the combo. The head is very unsmooth, it moves in jerks unless you back the tension way off and if you do back it off it won't hold the heavier lenses very solidly. It doesn't stay in place, when you release the grip it droops a bit which is frustrating with a long lens . The combo is also not very solid and vibrates for about 1/2 sec. When shooting wildlife where it is not practical to use mirror lockup I find I don't get sharp images below around 1/400 sec which means using a high ISO setting (not a problem with the 5D )
I've just ordered a RRS BH-55 and will try it on the 055PRO.
I really like the flexibility of the 055PRO, especially for macro it's very versatile however because of the way the center column is held in place at the top of the leggs by a split block I'm a little suspisious that it contributes to the vibrations.
If the BH-55 doesn't tame the vibrations on the 055PRO I plan to get a Gitzo carbon fiber model which with the BH-55 will be a little lighter than my current setup.
Can anyone tell me how solid the Gitzos such as the Explorer 2257 with the tiltable center colunms are ? or should I stick with the standard leg sets 1325 etc ?
Steve.