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[filmscanners] Re: Real-World Scene Brightness Range



Stan
Yes, I did measure the white shirt inside.  You are correct.  It was 11.0

Another interesting aspect of this is that the difference between the shirts
in the sun was 4.8 stop  whereas inside it was 4.0.  I think I'll check this
phenomenon out the next time I'm out shooting.  Makes me wonder a little bit
about the linearity or accuracy of my meter at greatly different EV's
.....hmmmmm

Brad

On 5/13/02 1:22 PM, "Stan McQueen" <stan@smcqueen.com> wrote:

> 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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