05-18-2011, 10:15 PM
[quote name='IanCD' timestamp='1305755685' post='8554']
I hadn't realised the aperture was subject to a multiple (or rather, division) as well...
[/quote]
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
I hadn't realised the aperture was subject to a multiple (or rather, division) as well...
[/quote]
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
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