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George,

If you can get your hands on a DSLR digital camera with a clear UV
filter screwed snug to the lens then look through the view finder at a
bright desk lamp through a window with the front of the lens touching
the window and tilted to one side or the other then you will see the
displacement effect. Your observation that the images are being
displaced as the they would in a Bris is correct.

Greg

On Aug 4, 10:46�am, "George Huxtable"  wrote:
> Greg Rudzinski wrote-
>
> "Even just the camera held to a single pane window surface and cocked
> slightly would create multiple reflections."
>
> Not if the glass itself has its surfaces parallel, in which case, for an
> object seen at infinity, the two images coalesce exactly, just as they do in
> the case of the two reflections from a back-silvered sextant mirror.. Such a
> displacement as Greg describes calls for some degree of "wedginess" between
> the surfaces.
>
> George.
>
> contact George Huxtable, at �geo...@hux.me.uk
> or at +44 1865 820222 (from UK, 01865 820222)
> or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
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