----- Original Message -----
From: "Dan Scott"
Subject: Re[2]: Tilt Shift lens for 35mm
>
> Is there anything special about the way the swings and tilts
work on large
> format cameras (I'm thinking of the simple old wooden ones,
not modern
> studio cameras) that would keep someone from, say, taking the
bellows off a
> junk folder and cobbling together that with a pentax body and
making their
> own Franken-PC lens? I understand the lens used has to cast a
large enough
> image to cover the film, but what else would one need to be
mindful of?
Any old folder will have an image circle of at least 80mm,
if you can find a 6x9 folder, the image circle would have to be
at least 100mm, so the amount of movement you wanted to build in
would be restricted by the amount of mill work you wanted to do
building the standards. The lens would be no problem.
The problems will be caused by lens quality and the camera
body itself. First, the old folder's images were not
being enlarged as much. The lenses, generally will not likely be
all that great at the enlargements needed for making prints from
the 35mm format.
The bigger problem lies with the camera body. Because of the
depth of the mirror box, lens movements would be very restricted
by vignetting. 35mm (and MF) perspective control lenses, having
their rear element at the lens flange don't suffer this problem.
I suggest a better solution is to abandon 35mm when you run
into a need that 35mm doesn't support well. A far better
solution would be to get into an inexpensive large format system
for when camera movements are deemed necessary
William Robb
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