Re: Mounting Gauges

[P3D <Linnstaedt@xxxxxxx>]

Paul Talbot writes,
<< ...what is the difference between a Realist format mounting gauge and a
European format mounting gauge? >>

Answer:  0.3 mm

You might next ask "which way?":  
Realist format calls for 62.4 mm centers;  European calls for 62.1 mm
centers.  So, if you use Realist format for mounting an RBT, the danger is
mounting far points too far.  Not a problem except in projection, IMHO.

If on the other hand, European gauge is used with RBT, then chips transferred
to a Realist mount, you could wind up with things poking through the window
inappropriately.  ;-)

Practically, I don't think it will be a problem except in projection, and
then only in situations which really push the limit.  When mounting chips, if
your eye is not directly above the vertical line on the gauge, parallax
errors can easily exceed 0.3 mm.

Is .3 mm getting too fussy?  I've mounted with the right gauge and the wrong
gauge and cannot tell the difference on-screen.  But then, I may be seeing my
slides through rose-tinted polarized glasses.  8-)

Robert


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