 Vinod K. Menon |
Getting the right Focus
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Jessica Jenney |
You could have kept the setting on auto and maybe used fill flash so the dog's face would be clearer.
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robert G. Fately |
Vinod, you don't say what lens you used here, but in general the reason both the dog and background are not in sharp focus has to do with the limited "depth of field (DOF)" with that lens at that f-stop. DOF describes the "thickness" of the sharply focused area in front of and behind the actual distance you focus the lens at. In other words, if you focus at 100 feet, then the DOF might be everything from 80 feet to 140 feet from your camera - items within that band would have acceptable "circle of confusion" - in other words, they would appear sharp. Now, DOF is affected by two factors - the f-stop you use and the focal length of the lens. (at least that's true in normal use, at macro distances DOF gets paper thin anyway). Higher f-stop (smaller apertures) have greater DOF. Shorter focal lengths have greater DOF. I imagine that you used a telephoto lens for this shot; so the focl length of the lens contributes to a shallow DOF. If there wree enough light or your ISO were set high enough and ou could have taken the shot at, say, f16, you migh have found that the distant background was also in sharp focus. Anyway, that's the basic issue. I believe landscape mode is one where the camera attempts to maximize DOF, though, so it may be the ISO wasn't high enough to allow for a small enough aperture. Hope that helps
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Jessica Jenney |
Bob, it says he used a point and shoot!
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robert G. Fately |
Jessica - A) I don't see where he says he used a P&S. B) what I said still holds true - if he used aperture preferred then he could use a smaller aperture, right?
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W. |
Bob, A) it says "Cyber-shot DSC-H2 Digital Camera" under his photos... Technically, that's a P&S camera with a super zoom lens. B) indeed, with Av – aperture priority – he could have selected a smaller aperture and gotten a greater DoF.
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Vinod K. Menon |
Thanks Guys, though I like to think otherwise technically My Sony DSC H2 comes under point and shoot Category. to answer your question BOB I did not use any conversion lens - The lens used was the built in lens that comes with the camera- • 36-432mm equiv • 12x optical zoom - • Carl Zeiss Vario-Tessar - • F2.8-3.7 - Overall I get the message that I should have used F/8 which is the smallest aperture I have.
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