11-12-2010, 01:29 PM
Following on from the Sigma 30mm thread active at the moment, I'm wondering in general, do you have lenses which front or back focus? Do you use micro-adjust if available? And how much?
Of lenses I still own, I now have 4 which I need to set AF micro adjust in the camera body. The correction values I'm using are as follows:
Canon EF 35mm f/2: +3
Canon EF 50mm f/1.8 II: +8
Canon EF 85mm f/1.8 USM: +5
Zeiss 2/50 ZE: +16
For those not familiar with the Canon system, the value ranges from -20 to +20, where 0 is no correction. A positive value puts the focus point away, a negative value brings it closer.
With all these fast lenses, the actual focus plane is somewhere forward of where the camera thinks it is. My next fastest lens, Sigma 150mm f/2.8 macro, does not need any adjustment. Nor do any of the zooms I have.
Of lenses I still own, I now have 4 which I need to set AF micro adjust in the camera body. The correction values I'm using are as follows:
Canon EF 35mm f/2: +3
Canon EF 50mm f/1.8 II: +8
Canon EF 85mm f/1.8 USM: +5
Zeiss 2/50 ZE: +16
For those not familiar with the Canon system, the value ranges from -20 to +20, where 0 is no correction. A positive value puts the focus point away, a negative value brings it closer.
With all these fast lenses, the actual focus plane is somewhere forward of where the camera thinks it is. My next fastest lens, Sigma 150mm f/2.8 macro, does not need any adjustment. Nor do any of the zooms I have.
<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.