 Stephen |
TO Mr. John Lind Thanks for the charts, but you forgot to put to post a 35mm DOF chart, you mistakenly posted two 50mm charts. Please get that post up asap.
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John A. Lind |
Done; see the original thread below: http://www.betterphoto.com/forms/qnaDetail.php?threadID=1904 -- John
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Stephen |
John, do all these charts only work if your like 1.21 feet away for a subject (example from 28mm chart)? HELP
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John A. Lind |
They cover a focus distance of 1.25 feet to infinity. See the top row of the chart just under "Focus Distance (feet)." The "near" and "far" limits of the DOF for that focus distance are in the column under it for each common lens aperture from f/2.8 to f/32 (see the far left column under "Aperture." Examples (28mm chart): -- John
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Stephen |
Can u explain the usage of this chart in any easier terms John? at the top of chart where it says DOF, if I am using 5.6 under the column in the DOF section that says 3, does that mean focus at about 2.6 feet from subject to get a maxium depth of 3.6 feet?
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John A. Lind |
No. The top row of numbers are lens focus distances. It means if you set the lens aperture to f/5.6 and its focus at 3 feet, the depth of field in the picture will be from 2.6 feet to 3.6 feet. The depth of field is an area both in front and behind the distance the lens is focused for. Look at the next pair of numbers below the 2.6 and 3.6 you asked about: 2.5 feet and 3.9 feet. If you set lens aperture to f/8 and its focus to 3 feet, the depth of field in the picture will be from 2.5 to 3.9 feet. -- John
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