Re: Large formad drawback?

"geo" <[EMAIL PROTECTED]> wrote in message news:<[EMAIL PROTECTED]>...
> "Collin Brendemuehl" <[EMAIL PROTECTED]> wrote in message
> news:[EMAIL PROTECTED]
> > DOF is controlled primarily by 2 things -- 
> > focal length and aperture opening size --
> > and secondarily, less significantly by
> > optical design.
> >
> 
> Focal length does not change depth of field. A 35mm lens has the same depth
> of field as a 400mm lens at any given aperture. Wide angle lenses have
> greater APPARENT depth of field because distant objects are smaller and the
> lack of sharpness is less obvious but if you were to measure it DOF is
> exactly the same.
> 
> Natural Light Black and White Photography
> http://mysite.verizon.net/geost/
> -George-


I didn't say that.
Note the word "and".  (It's in a language called "English".)

Two different lenses with 1" opening AND an 8" focal length 
will produce the same DOF characteristics.
This is affected secondarily by optical design.