11-12-2010, 02:17 AM
[quote name='popo' timestamp='1289516982' post='4111']
My sharpness observation is a bit trickier, as I found it very difficult to get the focus exactly the same with both lenses even with zoomed live view.
[/quote]
This happens when the CA is very strong. It confuses us when manual focusing because sometimes focus can be seen coming in and going out at multiple distances (but at very close distances and at high magnifications only... like in your magnified LV). I've had the most trouble with this problem in the Nikon 24 1.4G corners and the Canon 50 1.2L corners.
[quote name='popo' timestamp='1289516982' post='4111']
I have to wonder if the aperture sizes might be fractionally different leading to the Canon taking over sharpness stopped down, and at the same time explaining the suspected lower exposure on the Zeiss.
[/quote]
Fractionally different at same f-numbers? Well there are other lens-specific things that can cause a difference in exposure... e.g. vignetting, light transmission, flare, etc. But I'm not sure why this should be such a big deal because we meter for each lens using TTL metering.
GTW
My sharpness observation is a bit trickier, as I found it very difficult to get the focus exactly the same with both lenses even with zoomed live view.
[/quote]
This happens when the CA is very strong. It confuses us when manual focusing because sometimes focus can be seen coming in and going out at multiple distances (but at very close distances and at high magnifications only... like in your magnified LV). I've had the most trouble with this problem in the Nikon 24 1.4G corners and the Canon 50 1.2L corners.
[quote name='popo' timestamp='1289516982' post='4111']
I have to wonder if the aperture sizes might be fractionally different leading to the Canon taking over sharpness stopped down, and at the same time explaining the suspected lower exposure on the Zeiss.
[/quote]
Fractionally different at same f-numbers? Well there are other lens-specific things that can cause a difference in exposure... e.g. vignetting, light transmission, flare, etc. But I'm not sure why this should be such a big deal because we meter for each lens using TTL metering.
GTW