"J. C. O'Connell" wrote:
 
> Your talking something different here.
> The inital suggestion was that a 400mm 645
> lens would  be much different than a 400mm 35mm format
> lens ON THE SAME 24x36 DSLR CAMERA! Not true.

        ah - here's the crux of misunderstanding  :^)

        The assumption was that a 400mm for 645 would function
        *the same* - ie: the sensor would crop into the lens'
        image circle and the *resulting image" would seem (to
        an eye not overly concerned w/ the physics of DOF, etc)
        as if the lens were longer than it actually is, mostly
        just a reduced field of view effect. But that's what the
        people seem to really like - you know, a Free Lunch!   ;^)

        Bill

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        Bill D. Casselberry ; Photography on the Oregon Coast

                                http://www.orednet.org/~bcasselb
                                [EMAIL PROTECTED]
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