02-17-2011, 02:47 PM
[quote name='Brightcolours' timestamp='1297950995' post='6191']
If you have focus shift, you simply have a miss focussed image. The camera focusses wide open, and when the aperture closes for exposure, the focus shifts. And you get out of focus results.
Field curvature, you get in focus centers and out of focus edges. Usually only noticeable when the corners are supposed to be clearly in the same focal plane as the center, but OOF.
[/quote]
Thanks... What about the DOF dependencies? With the closed the aperture (lets say @ f/10) the focus shift arises during exposure but at the same time the DOF is increased. So depending on the shifted distance, it can happen that we cannot recognize the focus shift on the final image at all, right?
Regarding the field curvature: Is it constant on the edges regardless of the aperture value?
Serkan
If you have focus shift, you simply have a miss focussed image. The camera focusses wide open, and when the aperture closes for exposure, the focus shifts. And you get out of focus results.
Field curvature, you get in focus centers and out of focus edges. Usually only noticeable when the corners are supposed to be clearly in the same focal plane as the center, but OOF.
[/quote]
Thanks... What about the DOF dependencies? With the closed the aperture (lets say @ f/10) the focus shift arises during exposure but at the same time the DOF is increased. So depending on the shifted distance, it can happen that we cannot recognize the focus shift on the final image at all, right?
Regarding the field curvature: Is it constant on the edges regardless of the aperture value?
Serkan