[Leica] New Puts article

[hlritter at mindspring.com (hlritter@mindspring.com)]

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.

Shoot a picture of a person with various foreground and background objects 
with a wide-angle lens, and one with a telephoto lens at the same aperture 
setting from the same distance, print them cropped with the subject's head 
the same size in the final prints, and they will be identical in terms of 
depth of field. This experiment is equivalent to shooting with different 
sensor sizes, since the printed area comes from different-size areas of the 
same sensor.

DOF in a print at a given final image scale, of a subject at a given 
distance, depends exclusively on the f-ratio.

--howard


On 6/25/05 1217, "feli" <feli2@earthlink.net> wrote:

 
> The only thing that bothers me about a sub full frame size chip is  
> that it will be difficult to
> achieve the super shallow DOF you can get right now, when shooting  
> wide open and close up.
> 
> If i remember correctly a half size sensor, doesn't mean twice the  
> DOF at the same stop, because
> it isn't a linear progression. I would be curious to know how big the  
> difference really is...
> 
> feli