Shay Stephens
Jan-10-2004, 07:01 AM
In another thread, Baldy posted a picture by Ansel Adams. I thought it would be fun to do an analysis of the photo to see if we could find out how it was made. One possible solution stood out like a sore thumb.
This is the picture in question:
http://www.shaystephens.com/forums/ansel1.jpg
One of the things you notice first off about the picture is of course the color, but I was also drawn to the exposure. How did Ansel expose this shot? We know he used the zone system, so does this image follow the zone system? And if so, how or where?
Well lets look at the histogram firstly:
http://forums.shaystephens.com/graphics/anselh1.jpghttp://www.shaystephens.com/forums/anselh1.jpg
Would you look at that! Look at that big huge peak centered smack dab on -2EV (or zone III on the zone sytem). Why is this so interesting? Because -2EV just so happens to be the darkest thing in the frame that still shows full detail, go darker, and the detail starts getting lost to the shadows.
So this leads me to believe that Ansel metered and exposed this image for the dark detail in the scene. This picture shows where all the -2EV portions are located:
http://forums.shaystephens.com/graphics/ansel2.jpghttp://www.shaystephens.com/forums/ansel2.jpg
Ah but you say, how do you know that is the -2ev portions? Easy, just look at the histogram one more time:
http://forums.shaystephens.com/graphics/anselh2.jpghttp://www.shaystephens.com/forums/anselh2.jpg
Look at that notch taken right out of the histogram at the -2ev location! That nails the identification of the areas shown in yellow as the -2ev locations.
This is interesting, because I might have metered for the bright part of the stone in the foreground. And where would a camera have auto-metered this scene? Probably nowhere near as recognizable as our buddy Ansels version ;-)
This is the picture in question:
http://www.shaystephens.com/forums/ansel1.jpg
One of the things you notice first off about the picture is of course the color, but I was also drawn to the exposure. How did Ansel expose this shot? We know he used the zone system, so does this image follow the zone system? And if so, how or where?
Well lets look at the histogram firstly:
http://forums.shaystephens.com/graphics/anselh1.jpghttp://www.shaystephens.com/forums/anselh1.jpg
Would you look at that! Look at that big huge peak centered smack dab on -2EV (or zone III on the zone sytem). Why is this so interesting? Because -2EV just so happens to be the darkest thing in the frame that still shows full detail, go darker, and the detail starts getting lost to the shadows.
So this leads me to believe that Ansel metered and exposed this image for the dark detail in the scene. This picture shows where all the -2EV portions are located:
http://forums.shaystephens.com/graphics/ansel2.jpghttp://www.shaystephens.com/forums/ansel2.jpg
Ah but you say, how do you know that is the -2ev portions? Easy, just look at the histogram one more time:
http://forums.shaystephens.com/graphics/anselh2.jpghttp://www.shaystephens.com/forums/anselh2.jpg
Look at that notch taken right out of the histogram at the -2ev location! That nails the identification of the areas shown in yellow as the -2ev locations.
This is interesting, because I might have metered for the bright part of the stone in the foreground. And where would a camera have auto-metered this scene? Probably nowhere near as recognizable as our buddy Ansels version ;-)