jj_glos wrote:
As I understand it the AF in the 1Ds2 is the same as the 1D2n, it is actually alluded to that the AF in the 1Ds2 is at an advantage as it doesn\'t have to work at 8fps... In my experience the 7D holds up very well to the 1Ds2, this is for various uses from children playing with AI Servo and the lens wide open (f1.4-f1.8), to motorsports, airshows, football and rugby. BiF I have not done enough to really comment on, but I haven\'t noticed a huge difference there either with the limited shooting I have done.
You are right, 1DsMkII and 1DMkIIN Servo AF performance is similar, perhaps one could even say identical. ( The problem with 1DsMkII is that it starts to choke up after a burst of 10 shots or such, which does affect its action tracking performance .)
After I\'had given up on trying to get 7D to AF on incoming pijuns in flight, I turned to bigger and slower targets: seagulls. Unfortunately, by that time I lost my 1DMkIIN so I had to continue the 7D tests against 1DsMkII on incoming seagulls in flight.
The typical test shot was as shown on the image below (1DsMkII + 200 f/2 IS wide open). Although seagulls normally fly much slower than pijuns, thus the test was much easier, 7D exibited more erratic focusing than 1DsMkII.
The very last thing I tried was the central zone auto AF selection on 7D on some fast flyby and head-on targets. (All prior tests were done with center AF point selected + expansion.) That AF mode made the 7D performance much worse, so out of 92 frames not even one image was in acceptable focus . That really didn\'t come as a surprise. I was never a friend of any sort of auto AF point selection, and 7D has not changed my mind in that regard either.
Jan 07, 2012 at 11:35 PM
Previous versions of PetKal's message #10226397 « What of the Canon 1D MK2n? »
That really didn\'t come as a surprise. I was never a friend of any sort of auto AF point selection, and 7D has not changed my mind in that regard either.