01-09-2014, 08:06 AM
Don't forget the depth of field is dependant on things other than focal length and aperture, but also focus distance and sensor format.
The depth of field on a 50mm f/1.2 still isn't a problem for AF in most cases. You've got around a couple cm to play with assuming you're shooting wide open at 1m. At worst, you may need a little AF micro-adjust. I tend to find I need to set it on faster primes, but once done the AF is repeatable with a high success rate.
A 135mm f/2, or even 300mm f/2.8 would be far worse under similar conditions, but of course they would normally be used at greater distance than a 50mm would be. I don't currently have a super-fast 50mm, but I do have and use 135/2 and 300/2.8 and don't have any problem with AF accuracy.
The depth of field on a 50mm f/1.2 still isn't a problem for AF in most cases. You've got around a couple cm to play with assuming you're shooting wide open at 1m. At worst, you may need a little AF micro-adjust. I tend to find I need to set it on faster primes, but once done the AF is repeatable with a high success rate.
A 135mm f/2, or even 300mm f/2.8 would be far worse under similar conditions, but of course they would normally be used at greater distance than a 50mm would be. I don't currently have a super-fast 50mm, but I do have and use 135/2 and 300/2.8 and don't have any problem with AF accuracy.
<a class="bbc_url" href="http://snowporing.deviantart.com/">dA</a> Canon 7D2, 7D, 5D2, 600D, 450D, 300D IR modified, 1D, EF-S 10-18, 15-85, EF 35/2, 85/1.8, 135/2, 70-300L, 100-400L, MP-E65, Zeiss 2/50, Sigma 150 macro, 120-300/2.8, Samyang 8mm fisheye, Olympus E-P1, Panasonic 20/1.7, Sony HX9V, Fuji X100.