Like I posted previously, with the larger format your depth of field will be less and if you try to correct with a smaller f-stop your results will be limited by diffraction.
Originally Posted by keithwms
The reason your depth of field will be less is because you are focused CLOSER to the object (in terms of film format diagonals) with the large format camera. All else being equal (ie subject size, subject distance, final print size, absolute aperture 6mm or whatever, etc).
Indeed with pictoral subjects, the depth of field is nearly the same between large and small format cameras when absolute aperture diameter is the same. But once you move in close, the smaller format camera is always going to win in terms of depth of field. If you try to stop the larger format lens down to match the depth of field of the smaller camera, the smaller camera will win again, because its image will be sharper.
Here is a relevant thread: http://www.largeformatphotography.in...ad.php?t=38494
Last edited by ic-racer; 08-24-2008 at 02:10 PM. Click to view previous post history.