P3D Adjusting Realist focal plane

["KENNETH LUKER" <KLUKER@xxxxxxxxxxxxxxxxxxxxxxx>]

After two or three rolls of increasingly carefully focused shots on 
my Realist 2.8, I've concluded that the focal plane focusing 
mechanism is not adjusted properly, and I want to fix it myself.  The 
symptom:  Even using the appropriate parfocal settings, the distant 
parts of the shots are consistently out of focus.  I've ruled out 
camera motion.  I haven't yet tried setting the focus at infinity and 
shooting something with infinity in it, but instead I put infinity at 
or inside of the "far" f-stop setting I'm using, and expect everything 
from infinity to the near-distance marker that is just inside the 
"near" f-stop setting to be in focus.  

I've believed that I could set up a target at, say, ten feet from the 
camera, put a ground glass (or frosty scotch tape) at the film plane, 
open the diaphragm to its widest, and focus the target.  Then, I 
should be able to move the knob so that the indicator says ten feet, 
and lock it down.  Is that the right procedure?  And if so, how do I 
loosen the knob so I can change its setting without changing the 
focus?  Or should I leave the knob locked in at ten feet and adjust 
something else to bring the target into focus?  And is ten feet the 
best choice, or should I be using three feet?  or infinity?  Thanks!

Ken Luker
_______________________________________________________________
Kenneth Luker
Marriott Library Systems and Technical Services
KLUKER@xxxxxxxxxxxxxxxx


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End of PHOTO-3D Digest 2514
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