[wim]

[quote name='BG_Home' timestamp='1288597688' post='3859']

Same aperture, same composition, a FF shot has more shallow DoF than an APS-C shot. Yes, you can use a wider aperture on the APS-C, but when you're at f/1.4 on the FF, I guess you won't find an APS-C lens that'll give you the equivalent aperture.

[/quote]





[quote name='Brightcolours' timestamp='1288614014' post='3864']

Not true. Same aperture, same field of view, SAME DOF.



Aperture is measured in mm's. f-values are focal length divided by aperture.



Your proposition is a bit strange: One chooses an aperture to get the desired DOF. One does not choose an f-value just to take it as "standard across sensor sizes".



So Win is very right.... APS-C does NOT have a DOF "advantage". Equivalent f-values + equivalent field of views deliver equivalent images. And image softening diffraction also sets in at equivalent f-values. So in all aperture related areas, they are equivalent. Only FF has an advantage, as it can reach f-values with no equivalent available for APS-C (like you correctly identified).

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Yep, quite right, BC. It is all about equivalent apertures. FF has quite an advantage here, because for the large apertures there is no equivalent one on APS-C. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />



Kind regards, Wim