P3D Re: Rever DOF scale: stereo fantasy

[michaelk@xxxxxxxxxxxxxxxxxx (Michael Kersenbrock)]

> > >
> > > Be very wary of those DOF scales on the Revere!
> > 
> > And the Realist Cover?  Not much different than the Revere!
> 
> I beg to differ.  The distance between 3 feet and 4 feet is huge
> when you are talking about focus.  On the DOF scale on the Realist,

Revere (as quoted):  3.5 ft to INF
My Realist (cover):  4.0 ft to INF 


If one wants infinity AND something at 3.49 feet, then
yes, there's a difference, but if one steps back
just a bit I find it hard to see those two "specs"
as being wildly different.  If one has that FULL
range in a set of slides, mounting them
properly for projection might be tricky I suspect.
So in a practical sense, they are identical even if one
is fibbing more than the other (or not) whereas one
wouldn't be USING the full indicated range anyway. Tiny
distance numbers on mechanical knobs, IMO, are at best 
"rough guidelines", not something exact.  The design,
fabrication, and calibration (over time) tolerances 
seem unlikely to be tremendously precise.

Anyway, it usually isn't a good idea to push the edges 
of "specs" unless one "gotta".  :-)

Mike K.



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