Re: PHOTO-3D digest 2061

[P3D <jeffjess@xxxxxxx>]

>Back to Jamie's remark, I suspect that the lack of sharpness at 
>infinity seen in pictures from vintage stereo cameras is due
>to not focusing at infinity.  Another factor might be that the
>camera needs ajustment (the calibration that the Kodak went 
>through) to correct focusing so that the image at infinity is 
>sharp when the lens is focused at infinity.


I agree with Dr. T's comments about focusing at infinity.

Another reason I think many have accused the Kodak of not focusing 
properly, particularly at infinity, is that their DOF scale is not as 
conservative as say, the Realist. On the Kodak, using the hyperfocal 
distance, it says you're in focus from 5 1/3 feet to infinity at f8. 
But if you set the Realist to the hyperfocal distance at f8, it says 
you/re in focus from 10 feet to infinity. So the Kodak is allowing a 
bigger "circle fo confusion" using their DOF scale, which might have 
been acceptable to most in the 50's, but is not for most on this list. 
But I agree with you, you shouldn't use the hyperfocal distance unless 
you have close objects and really need it! And even then, I would use 
1 or 2 f-stops larger than what the camera is set at.

Jeff Jessee

Dr. T.-The best features of the Kodak to me are its light weight (Jess 
Powell says that's why its his camera of choice for trips),the level, 
the controls all visible from above, and the rewind knob.

Jeff Jessee


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