10-10-2010, 07:44 PM
However you look at it for a given technology level, 35mm should always have a 1stop advantage over APC-S due to it having twice the area to gather light.
So for low light, ISO1600 FF should be about the same as ISO800 APS-C
For Shallow depth of field, FF f/2 gives same DOF as APS-C f/1.4 (with same FOV). Thus to achieve what you get with a 50mmm f1.4 on APS-C you would need a 33mm f/1.0 -> expensive!
If you want large DOF then they should be equal:
FF: 24mm, f/16, ISO200, 1/100
APS-C 16mm, f/11, ISO100, 1/100
Should both give the same result in terms of resolution and DOF.
I think theoretically you should be able to get 1 stop better dynamic range from 35mm than APS-C but i'm not sure if this lives out in practice...
So for low light, ISO1600 FF should be about the same as ISO800 APS-C
For Shallow depth of field, FF f/2 gives same DOF as APS-C f/1.4 (with same FOV). Thus to achieve what you get with a 50mmm f1.4 on APS-C you would need a 33mm f/1.0 -> expensive!
If you want large DOF then they should be equal:
FF: 24mm, f/16, ISO200, 1/100
APS-C 16mm, f/11, ISO100, 1/100
Should both give the same result in terms of resolution and DOF.
I think theoretically you should be able to get 1 stop better dynamic range from 35mm than APS-C but i'm not sure if this lives out in practice...