I should have read the post I was responding to better please ignore.
P. J. Alling wrote:
11mm of movement may not very much, except when you're talking about
it in terms of moving the APS-C sized sensor, within the camera body.
Then you're looking at a movement that's 45% of the sensor's long axis
and 69% of it's short axis, with a commensurate increase in the size
of the mirror box, mirror, prism, etc or a maybe a live view only
camera, which would still be larger than a K20D in most dimensions,
except for possibly the lack of a prism "hump". A specialized camera
like that might be possible but not as a general purpose SLR or even
EVIL camera.
Now if you plan to use lenses for 24x36mm lenses you get 8mm of
movement in either direction, 33% movement in long axis and 50% on
the short axis, but Pentax seems to have stopped using the old 35mm
mirror boxes and mirrors with end of the *ist-D series. Now the K7d
by all accounts, (well the two I've read so far anyway), state the
it's shutter and mirror are exceptionally quite, which is probably
made possible partly by it's APS-C sized components. So why Pentax
would give that up to build a camera with a larger noisier shutter
mirror assembly I cannot fathom.
If you want to use medium format lenses you can already get shift
adapters from Pentacon-6 mount to K mount.
http://araxfoto.com/accessories/shift/
I'm sure you could have one made for 645 or 6x7 lenses. This likely
to be the state of art for some time to come.
Adam Maas wrote:
Enough to support 11mm of shift on a 35mm frame. There's a couple 35mm
mount tilt/shift adapters available that use P645 lenses, usually the
FA35.
-Adam
On Wed, May 20, 2009 at 10:02 PM, Nick Wright
<nickwright1...@gmail.com> wrote:
Sure, do we know how large the image circle of a typical FA645 lens is?
On Wed, May 20, 2009 at 8:56 PM, John Francis <jo...@panix.com> wrote:
On Wed, May 20, 2009 at 08:49:54PM -0500, Nick Wright wrote:
8-11mm isn't a terrible lot of movement.
I wonder how difficult it would be to implement a sensor shift of
that
magnitude in say a medium format digital body?
Can you imagine that? It wouldn't give you tilt control (but perhaps
that wouldn't be that hard to put in either?) but just think being
able to apply shift to any lens you put on the body?
That only works if the image circle of the lens is large enough,
otherwise you're going to have serious vignetting problems.
TANSTAAFL.
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