Re:mismatched lenses

[P3D <Joyzelle@xxxxxxx>]

Todd Eifert wrote:

>I have been shooting with my second realist for a year now and finally
>realized (after using RBT mounts) that one image appears a little larger
>than the other.  When I line up the bootom during mounting, one of the
>images sticks up a little higher into the frame.  Anyone have a possible
>cause or solution.  Maybe if I tighten or loosen the lense board screws
>on one side?

Jon Golden replied:

>Did you mean one image sits "higher or lower" when put in RBT's with the
>same pin bar setting.   "Larger" would be a result of mismatched zoom
>lenses perhaps...but a fixed lens in a Realist??.....check that again.

Jon, I believe Todd's description is accurate --- one image is larger than
the other, enough so, that when the bottom of the frame is perfectly in
allignment, the allignment at the top is not possible.  I know exactly what
Todd means because my 2.8 Realist shows the same characteristic.  While the
problem is obvious when closely examining a mounted slide in my RB viewer, it
doesn't make viewing a problem (at least not for me).  But I do wonder if
someone with marginal stereoscopic accuity in their binocular vision wouldn't
end up with the classic 3D eyestrain viewing slides taken with my camera as
opposed to slides from another camera with perfectly matched lenses.

BTW, I ran a check to verify there is a difference in the film chips and not
the mounts (I was using Albions, not RBT's when I discovered the problem).  I
remounted a stereo pair pseudoscopically (right became left and left became
right).  The result was the chip that showed more or less of the scene at the
top in one aperture, maintained that relationship when the chips were
switched.

So, I'm asking the same question Todd asked --- Anyone have a solution?
 Also, how common is this among Realists?  Time for another poll?  

Allan Carrano, Connecticut (used to be North Carolina)     




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