05-18-2011, 10:19 PM
[quote name='mst' timestamp='1305756934' post='8559']
Not the aperture itself, of course. It stays the same physically and in terms of metering. However, the depth of field is affected. A 85/1.8 lens on DX gives roughly the same depth of field (in the final image) as a 135/2.8 lens on FX.
-- Markus
[/quote]
Thanks Markus,
So that's about 2 stops (does it stay more or less constant?)
Which would have a detrimental impact on (shallow) DoF except that DoF gets shallower with increased focal length... so do the effects cancel each other out..?
Not the aperture itself, of course. It stays the same physically and in terms of metering. However, the depth of field is affected. A 85/1.8 lens on DX gives roughly the same depth of field (in the final image) as a 135/2.8 lens on FX.
-- Markus
[/quote]
Thanks Markus,
So that's about 2 stops (does it stay more or less constant?)
Which would have a detrimental impact on (shallow) DoF except that DoF gets shallower with increased focal length... so do the effects cancel each other out..?