P3D [dxk10@xxxxxxxxxxx: 4x5 experiments]

["Dr. George A. Themelis" <DrT-3d@xxxxxxxxxxxxxxxxxxxxxxxxxxx>]

>From: "David Kazdan" <dxk10@xxxxxxxxxxx>
>
>    George:
>    
>    I tried to post this to the list but it bounced.  Thought you might be
>    curious, anyway.:
>    
>    
> I am coming to believe that cardboarding is a resolution problem.
>    
> I have been using a Sputnik 6x6 with transparency film; the texture and
> modeling difference in faces between that and smaller formats is striking. 
> Over the weekend, my  wife and I set up a tabletop with a Speed Graphic and
> transparency film.  Viewed with a ViewMagic on a light table, the modeling
> is extraordinary.  Both the 6x6 and the 4x5 were with Fuji 100 speed
> transparency film.
>    
> My own unscientific conclusion is that cardboarding takes place when the
> only real convergence detail is the edge of an object.  Good resolution
> with adequate convergence targets is needed for full surface modeling.
>    
> So perhaps it's the usual resolution story:  Slow film, tripods, cable
> releases, careful focus.
>    
> 		David    
>    --
> David Kazdan, M.D., Ph.D.      dxk10@xxxxxxxxxxx; Amateur Radio: AD8Y
> Anesthesiologist, Cleveland Veterans' Administration Medical Center
> Assistant Professor, Department of Anesthesiology, Case Western Reserve Univ.


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