[Leica] New Puts article

[jbilin at axionet.com (Jacques Bilinski)]

hlritter@mindspring.com wrote:

>Two prints at the same scale, one from a small sensor and one from a large 
>one, will have identical depth of field if shot at the same f-ratio.
>
>  
>
I don't believe this is true.  As Steve pointed out the 'circle of 
confusion comes into play'. In fact 2 prints from different size sensors 
will have identical depth of field if shot at the same absolute 
aperature (ie measured in millimetres), not the same f-ratio. 
Photographers who have shot portraits with large format cameras and 
subminiatures may know empirically that the large format camera will 
show a shallower depth of field at the same f-ratio. Has anyone seen any 
prints from a subminiature with shallow depth of field?