Re: Am I asking too much of a 50d plus 70-200 f/2.8
Well, I think the problem might be shooting bursts with AI focus. I\'m sure your AF could manage this just fine without that additional complication.
I think AI focus anticipates the focus by measuring subject speed and then updating focus based on that speed. Soccer players don\'t necessarily maintain a constant velocity; you might just be asking too much of your equipment here. Maybe she gave a burst of speed before you shot and tricked the AI? All I\'m saying is that maybe you should figure out the limitations of your equipment and try to work around them.
volyrat wrote:
Agreed that a 1d series should be better, but it\'s not like Canon positions this as a camera without any capability for sports. I\'m not trying to catch a hummingbird zipping across the yard at dusk. If the camera isn\'t capable, then Canon should position it as \"entry level\". On the contrary, Canon positions it as \"the next best thing\" - at least they did before the 7d.
And how would I anticipate focus when taking a burst of 5 - 10 shots using AI Servo focus? This isn\'t meant to be a wise guy question - if there really is something that I can do here, I\'d be happy to.
walter23 wrote:
Maybe if you expect sports-capable AF performance you should shell out the money for the sports-capable AF camera, the 1D-series one. I wouldn\'t blame the lens. It\'s clearly misfocused behind her (look at the grass in the full image). If you aren\'t going to buy a camera with the specifications for what you\'re trying to do, I\'d suggest you learn to anticipate focus, or otherwise modify your technique (stopping down, for example).
volyrat wrote:
So what happens in circumstances where I need f/2.8 to achieve SS?
I\'ve heard this suggestion before, and while it would likely improve the sharpness, I\'m one who thinks that if a lens is F/2.8 and has the L label, it should actually work at f/2.8.
Gochugogi wrote:
If it was me, I\'d shoot at F4 or F5.6 for increased DOF. In this light you still have plenty of headroom for a fast shutter speed.
Nov 08, 2009 at 01:28 PM
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