Re: flatness tests was Re: 617s :: Fuji vs Linhof vs ArtPan vs ....

[Simon Nathan <simonwide@xxxxxxxxxxxxx>]

though not a patented feature some tomiyamas can
develope what i have long ago called whiplash focusing. looking at the
top of your camera observe the tracking of the front standard which carries
the lensboard. it does not always remain body parallel travelling forward
and back. it it not an easy fix, but at least you can recognize the cause.
simon nathan  alignment check is visual.

Robert Monaghan wrote:

On Fri, 26 Mar 1999 Dgling@xxxxxxx wrote:

> One thread mentioned his ArtPan's right side picture can be soft sometimes -
> the feeding side; but I do not have this problem at all.   Is there some way
> to check for any mis-alignment, etc.   Even a few 10th of 1 mm may sufficient
> to cause some softness if one hold the circle of confusion to be 1/10th of
> 1mm.

see http://www.smu.edu/~rmonagha/mf/flat.html flatness tests near bottom

regards bobm