At 9:48 AM +0100 7/13/06, Peter Hancock wrote:
OK folks, here's another freaky problem. I was taking some wedding
pictures at the weekend with my 10D/28-80. Took 2 pictures of the same
group, using the self timer, camera on a tripod. On one the group looks
normal, filling the frame horizontally. On the other it has been
compressed laterally. The vertical coverage is identical in both, the
lens is recorded as being at 28mm for both. The only explanation I can
think of is that the camera rotated on the tripod just as it took the
picture, assuming the 10D has a horizontal plane shutter. Could the
acceleration of the first shutter blind cause the camera to move? Any
other explanations? I haven't brought the images in with me, so can't
post them anywhere just yet, but could do so tomorrow.
Peter
This almost certainly a hardware/software issue in processing. The
10D has a vertical shutter, and for the camera to compress the image
it would have to travel at a very significant rate at the moment of
exposure, with immense acceleration.
Is the image of the compressed photo (total frame) as wide as before?
ie, Is there more in the frame than on the correct shot? Only the
latter case is an indication of rotation of the camera, because then
the lens 'saw' more than 28mm worth of image width.
--
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:[EMAIL PROTECTED]
|[ ]| http://www.archiphoto.com
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