I've now shot close to 8,000 frames with my 50D. This morning I picked up my Mark III to do a little flight photography, and boy was it slow by comparison. There is no question in my mind that the 50D is head and shoulders better than the Mark III at flight photography when it comes to AI Servo AF performance.
Canon 50D, 400mm, f/7.1, 1/4000, ISO 400, -1/3 EC, no flash, hand held
Last edited by Doug Brown; 10-15-2008 at 01:44 PM.
Nice flight shot Doug. I am curious if you have used the 40D previously? I am asking to get a point of reference regarding your comment about the 50D's AF speed in Ai-Servo performance. I currently own a 40D.
Can I ask what you mean exactly when you say the 50D is heads and shoulders better than the 1D MKIII in Ai-Servo? Is this on the initial AF pickup? Do you mean the 50D stays on the bird longer or better (against distracting backgrounds, etc.)?
Would it be possible to provide a scenario of how differently the 50D would perform compared to a 1D MKIII? Thanks.
Hi Wilson! Good question. The 50D is significantly faster at initial focus acquisition, stays on the bird better, and produces substantially more keepers than either my Mark III or my 40D. I've shot extensively with the 40D, and was never terribly impressed with its AF when it came to BIF. The Mark III is good, and I've done a lot of BIF with it. The 50D is a big step up from the Mark III for BIF in my opinion.
Doug, thanks for sharing your experiences with the new 50D. Your results are outstanding.
Would you say that the improvements in the 50D BIF AF capabilities also equate to better AF performance on static subjects?? While I have many good images with the 40D, I have not been too pleased with the 40D AF overall. The results you are experiencing make it very tempting to get the 50D.
I'm not sure I entirely understand what you're saying Gary. Are you referring to your exposures or your colors with BIF. If you're having problems with varied BGs causing over- and under-exposure of BIFs, you might consider using manual exposure. I'm helping teach a workshop with Jim Neiger right now where we stress manual exposure for BIF.