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George,

I just pulled out my DSLR and did the infinity experiment that you
have proposed and a second reflective image of the Sun's image(not the
primary image) gets displaced as I angle the glass to one way or the
other resulting in two images of the sun with one bright and one dim.

Greg

On Aug 4, 12:02�pm, "George Huxtable"  wrote:
> > Greg Rudzinski wrote-
>
> > "Even just the camera held to a single pane window surface and cocked
> > slightly would create multiple reflections."
>
> And I had commented-
>
>
>
> > 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.
>
> Now Greg replies-
>
> "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. "
>
> Yes, indeed you will, in the case of the close-by desk lamp. But not in the
> case of an object at infinity, such as the Sun (as I wrote). �Greg should
> try the experiment to see.
>
> 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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