02-11-2012, 05:29 PM
Hi Popo,
Supposing the DOF of 85 1.4 on ca crop camera and 135 2 on a FF camera is roughly same...what effect the subject distance will have on it?
Is the DOF same for the equal distance or the same frame?
[quote name='popo' timestamp='1328809351' post='15759']
85*1.5=128mm equiv.
1.4*1.5=f/2.1 equiv.
It isn't an exact equivalent, but for practical uses it's close enough.
[/quote]
Supposing the DOF of 85 1.4 on ca crop camera and 135 2 on a FF camera is roughly same...what effect the subject distance will have on it?
Is the DOF same for the equal distance or the same frame?
[quote name='popo' timestamp='1328809351' post='15759']
85*1.5=128mm equiv.
1.4*1.5=f/2.1 equiv.
It isn't an exact equivalent, but for practical uses it's close enough.
[/quote]