anthony11 wrote in post #14242137
What about shooting a kid indoors? Shallow DoF because of the aperture required, and erratically moving target.
In my experience so far, ai servo isn't going to perform miracles. I've had awful results indoors with ai servo in low available light and shallow DoF at shutter speeds fast enough to avoid motion blur. Like: f/2, 1/200s, ISO 10000...out of focus, lots of noise. So, move it a stop down to f/1.4...still ISO 6400-ish and out of focus.
The solution is still a work in progress for me, but it looks like you simply need more light, and possibly need to increase the DoF, still. Anyone getting good results with ai servo at f/1.4 in good light, even?
I started using flash (550EX I had lying around) last night, and getting much better results.
Instead of f/2, 1/200, ISO 10000, now we're talking maybe f/4, 1/200, ISO 400 as a starting point, and probably better AF results from having a bit more DoF for the AF to work with. I haven't had a chance to check ai servo tracking, but flash recycle times mean not getting the fps...which is ok with me but may not be for some.
This is starting to be a thread hijack (sorry), so we really should move it under the other thread (Mark III AF settings). Here's the link to my response that matches my comments above: