[pure-silver] Re: Depth of Field (35mm vs. 4x5 or 8x10)

> As soon 
> as one moves the camera closer (to fill the frame), one starts losing DofF. 
> Those of you 
> who have worked with 4x5, can you confirm this one way or the other?

DoF is (mostly) about aperture and image magnification.  If you set up the 4x5 
to 
produce the same size image as the 35mm, you'll get the same DoF --  doesn't 
matter 
what lens you use.  So, when you increase the image magnification to fill the 
4x5 
frame, DoF decreases and you need a smaller aperture.  To get the same DoF in a 
full-
frame 4x5 as you did in the full-frame 35mm, you need to stop down about 5 
stops.

However, if the subject and composition allow, you may be able to use the 4x5 
camera's movements to reduce the DoF necessary to render the subject in sharp 
focus.  (But that's another subject....)

Chris Ellinger
Ann Arbor, MI  USA
http://www.ellingerphoto.com



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