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[filmscanners] Re: Real-World Scene Brightness Range



At 12:39 PM 5/13/2002 -0700, Brad Smith wrote:
>Nothing like real data ......I also took measurements (EV) with spot meter
>at noon in a very clear, sunny Los Angeles.  White T shirt and black knit
>shirt.
>               Full Sun   Medium Shade   5 Ft inside House
>White Shirt      18.0
>Black Shirt      13.2       9.4              7.0
>
>Result: 8.5 stops between bright white in full sun versus very non
>reflecting black in medium shade.

Since you didn't list them, I don't suppose you also took measurements of
the white shirt in the shade and inside the house, did you? It would be
interesting to compare. I would guess that the white shirt inside the house
would be much less than the black shirt in the sun. And yet, I'm sure that
our eyes would still see the white shirt in the house as being brighter
than the black one in the sun.

This also corroborates Anthony Atkielski and my assertion that ranges of 10
stops are not commonly seen in normal picture taking. But if you take a lot
of photos that include a black shirts inside a house and white shirts in
the full sun, you will get a range of 11 stops! I don't know if that would
be considered a normal scene by some, but it wouldn't by me. Now I really
want to know what was in that photo that someone referred to that had a
range greater than 14 stops (>16,000:1 range)!

Stan

================================
Photography by Stan McQueen
http://www.smcqueen.com

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