Archived posting to the Leica Users Group, 2009/02/14
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]At 9:34 AM +1000 2/14/09, Geoff Hopkinson wrote:
>Henning I follow. I was thinking about UV attenuation when I assumed the
>window glass would reduce IR too. Sounds like that we agree on my moon
>reflection.
>Care to comment on the elements described in my cantina shot?. I'm not
>convinced those are window glass reflections.
>Did you look at Nathan's pub shot, Alternate 9? No window involved there. I
>think that both of these are internal reflections related to having a filter
>on (not just UV/IR) I don't think that any of these are sensor bloom
>either.
>
>Probably I'm the only one thinking (too deeply) about these technical
>aspects ;-)
>Thanks for contributing on this and other areas when I post opinions.
>
I think in the Cantina shot those _are_ window reflections, and the
visibility and placement are completely due to relative light levels,
albedos or emission intensity of the objects and angles. As soon as
you shoot through windows you get them. As I mentioned before, window
glass is much, much more reflective than even single coated filters,
and will often have relatively brightly lit objects behind them.
Remember also that each sheet of glass has two surfaces, so things
like your arm are reflected twice (out of focus) and are additive.
I don't know which shot of Nathan's you're referring to (he has taken
a lot of pub shots :-)).
I'll be gone for a couple of weeks, so continuation of this thread
won't happen. In any case, expect reflections if you shoot through
windows, but don't let that stop you. :-)
--
* Henning J. Wulff
/|\ Wulff Photography & Design
/###\ mailto:henningw@archiphoto.com
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