11-01-2010, 01:58 PM
[quote name='Brightcolours' timestamp='1288618759' post='3877']
This is not true. If you select a SIMILAR DOF for both FF and APS-C, the diffraction softness effects on the image will be the same for BOTH formats. For FF you need to select a SMALLER f-value to get a similar DOF. And with that smaller f-value, diffraction effects on the image will be the same.
[/quote]
I don't agree with you BC... With the same lens to get the same FoV, you need to get closer to the subject. And to get the similar DoF you have to stop down more in FF. But in what extend? As far as I know, the delta between diffraction limited aperture of a FF and cropped sensor (with the same resolution) is more than the aperture increase to get the similar DoF. Maybe I'm wrong but this is how I know it...
Kind regards,
Serkan
This is not true. If you select a SIMILAR DOF for both FF and APS-C, the diffraction softness effects on the image will be the same for BOTH formats. For FF you need to select a SMALLER f-value to get a similar DOF. And with that smaller f-value, diffraction effects on the image will be the same.
[/quote]
I don't agree with you BC... With the same lens to get the same FoV, you need to get closer to the subject. And to get the similar DoF you have to stop down more in FF. But in what extend? As far as I know, the delta between diffraction limited aperture of a FF and cropped sensor (with the same resolution) is more than the aperture increase to get the similar DoF. Maybe I'm wrong but this is how I know it...
Kind regards,
Serkan