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11-24-2009, 05:39 PM   #31
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QuoteOriginally posted by stevebrot Quote
It did take a few tries to get it right, but the results were worth it.

The interesting thing was that before doing this comparison, I was of the opinion that the 85mm would show greater DOF based on its focal length. The original intent of the exercise was to demonstrate that. Boy was I wrong!

Steve
that's right ! I did some tests of my own before about FOV and OOF background differences between lenses with different focal lengths. come to mind are 24,28,35,50,85,100. tried replicating the foreground which was a bit tricky considering the angle and distance factor, and the background which is impossible to replicate but atleast come close a bit if you are comparing lenses with not so far-off focal lengths with each other. the degree of difference becomes more obvious as the focal length is increased. however, in a plain and back-against the wall single colored background, it is impossible or very difficult to tell if the shot was taken with a wide lens or a normal lens.

as far as DOF is concerned, size or length of the lens does not affect it but difference in camera sensor size does. full frame, APS-C and P&S camera shows this difference.

11-24-2009, 10:29 PM   #32
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Keep in mind that the DoF is the same for those two shoots, the perspective is the only thing that changes. In the 85mm, the background objects are comparatively larger and thus less is in the picture.
11-25-2009, 12:12 AM   #33
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QuoteOriginally posted by Eruditass Quote
Keep in mind that the DoF is the same for those two shoots, the perspective is the only thing that changes. In the 85mm, the background objects are comparatively larger and thus less is in the picture.
Amazing isn't it that a picture is truly worth a thousand words...

Steve
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