Perceptual Bases for Rules of Thumb in Photography
Perceptual Bases for Rules of Thumb in Photography
Perceptual Bases for Rules of Thumb in Photography
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Preferred Focal Length<br />
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Recommended focal length <strong>for</strong> 35-mm film is 50 mm <strong>for</strong><br />
natural-look<strong>in</strong>g photographs.<br />
Field <strong>of</strong> view <strong>for</strong> photograph given by:<br />
w = width <strong>of</strong> film<br />
f = focal length<br />
⎮ = angular subtense <strong>of</strong> photo from<br />
CoP<br />
We showed that critical ⎮ be<strong>for</strong>e distortion is ~40 deg (+/-20).<br />
Solv<strong>in</strong>g <strong>for</strong> f:<br />
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mm<br />
35
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