Posted 12 July 2018 - 12:45 PM
I have not used the 5D2 but I have used a few of the older tech AF DSLRs. I would stick with just the center point and forget tracking as that can move the AF point to one of the weaker AF points which might be especially bad given that the lens has an f/4 maximum aperture. Just try and keep the camera pointed at the subject with it on the center point. I have not used focus locking with the separate button (also can lock exposure) but others have. If I want the AF to stay locked I use single-shot AF and not continuous servo AF. It will stop AFing once the beep goes off in single shot.
Good idea to do some pool testing!
Edited by Tom_Kline, 12 July 2018 - 12:46 PM.
Thomas C. Kline, Jr., Ph. D.
Oceanography & Limnology
Currently used housed digital cameras: Canon EOS-1Ds MkIII, EOS-1D MkIV, and EOS-1DX; and Nikon D3X. More or less retired: Canon EOS-1Ds MkII; and Nikon D1X, D2X, and D2H.
Lens focal lengths ranging from 8 to 200mm for UW use. Seacam housings and remote control gear. Seacam 60D, 150D, and 250D, Sea&Sea YS250, and Inon Z220 strobes.