P3D Re: Realist image size distortion

[Marcus Warrington <marcusw@xxxxxxxxx>]

Gerorge wrote :
>Ken Luker brings an interesting idea in the Realist table.
>What appears to be yet another Realist "feature":  A crooked
>film plane. 
>I am not convinced that this is happening and don't recall seeing
>anything similar with my Realists (but I have noticed that there
>is some varying vertical registration - shift, not change in size)
>in some Realists.

Dont worry Ken your not going mad... I had the same problem. I noticed it
when I was trying to check/adjust the focus/rangefinder on my 3.5, after having
had the lenses apart to clean some fungus off them. 

As as I rotated the focus wheel the top of the film gate would some times stick 
while the bottom continued to move. I must say that I didn't noticed any image size 
problems, perhaps I should go back and check some old slides. Anyway I traced the 
problem to the sprocket counting cog mechanism, in the top of the Realist. A spot of 
silicon oil on the face of the metal connecting pawl seems to have cured the problem, 
but I keep an eye on it each time I load a new film.

On a related note my Realist 3.5 also vignettes at f11 , although I only really notice it 
on shots with lots of clear sky. My 2.8 doesn't vignette at all.. although tI dont really
see any improved sharpness between the images produced.


Marcus ?8^p
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End of PHOTO-3D Digest 2998
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