[pure-silver] Re: Large Format Tilt
- From: "Nicholas O. Lindan" <nolindan@xxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 29 Nov 2007 13:17:21 -0500
From: <C.Breukel@xxxxxxx>
My question still stands:
Back focussing is the same as front focussing?
It is, but only at far distances where
lens-to-subject > ~10x the focal length.
At near distances the back-subject distance is set first
for the desired magnification and then the lens position
is adjusted for focus. It is easy to remember the order:
it is the same as with an enlarger. For fun, try doing
it backwards...
With cameras that twist into pretzels, like Sinars,
with appropriate twisting there can be quite a difference
between front and back focus - though both will drive you
equally mad.
==
Nicholas O. Lindan
Cleveland Engineering Design, LLC
Cleveland, Ohio 44121
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