[LargeFormat] An 11x14 Ektachrome shot with rear half of a Protar VII convertible

[Jim Hemenway]

I can see one guy drinking a Cooors but I don't know how he found one in 
Boston. :-)

Richard, thanks for the compliment and for the info.  I used the rear 
cell behind the shutter/aperture and wonder if I used the front cell 
only, and in the front, is less optimal correction the only result?
Or, would the resulting photograph take on a different "look" since the 
front cell would be facing forward instead of backward as does either 
cell if used behind the aperture?

TKS,

Jim



>>
>>
> 
>    This is a quite remarkable picture. I suspect that with a
> strong loupe you can peek in on some of the secretaries
> adjusting their garters.
>    My Convertible Protar does not seem to have any color
> fringing. Fringing would certainly be obvious in yours
> because of the much longer focal length.
>   Note that the effective speed of a single cell depends on
> which side of the stop its mounted. In the normal position,
> behind the stop, the physical stop is the entrance pupil and
> the speed is f/12.5. If its mounted in front of the stop
> there is some magnification of the stop so the speed is
> increased a little, maybe to f/11.5 Behind the stop is
> optimum for best correction but the shorter bellows draw
> when its in front is sometimes more important.
> ---
> Richard Knoppow
> Los Angeles, CA, USA
> dickburk@ix.netcom.com
> 
> 
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-- 

Jim - http://www.hemenway.com