[Brightcolours]

[quote name='wim' timestamp='1321738040' post='13044']

Sorry, but your last statement is wrong. On crop the FL doesn't change, neither does the actual aperture.



However, what changes, due to the smaller format, is the CoC, and that is what causes DoF to change. This because DoF and sharpness is all about definitions, involving sharpness at a certain image size and viewing distance, from such a format.



Kind regards, Wim

[/quote]

You are totally wrong in thinking what I wrote is wrong. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/dry.gif' class='bbc_emoticon' alt='<_<' />



Nowhere did I state the focal length changes, nor did I state anywhere the aperture changes. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/huh.gif' class='bbc_emoticon' alt='' />



The DOF changes EXACTLY to what you would get with the FF equivalent I described. Does not matter if you want to approach that with the non-existent circle of confusion, or if you describe it with FF equivalence.

I did the latter. <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='' />