Ben F |
Hyperfocal Distance Q Okay, I understand the details of setting the camera to hyperfocal distance.. eg, shooting a pic at f16, I would line up the infinity mark against 16 on the DOF scale. Therefore I can only set for hyperfocal distance when im shooting at f16 or f22? Is this correct? I have another question. If I set my 45mm lense at f16 and focus at 3 meters, I get in the range of acceptable focus 1.72m - 12.7meters. Also, aperture affects DOF, so if im shooting a small aperture of f16 or f22, would the falloff in focus outside the focus range be more gradual than if I was using a larger aperture (Which has less DOF) say f5.6 or f8 in comparison?
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Peter M. Wilcox |
Here's a good link that explains it: http://www.luminous-landscape.com/tutorials/understanding-series/dof.shtml
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Jon Close |
Peter suggests a good link. In general, shorter focal length lenses give greater depth of field at each aperture than longer focal length lenses. For a 90mm lens the DoF is too compressed for it to be practical to print the DoF scale for any by f/16 and 22. At any aperture there is only a single plane of sharp, critical focus. Objects closer or farther than this distance will gradually be more out of focus.
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Michael H. Cothran |
Often there are marks for other f-stops, but not enough room for the manufacturer to engrave the actual f-stop. Nikon has a "color" system with their MF lenses, so different color lines would match the f-stop of the same color. If your lens has other markings, then these are probably for other f-stops. Michael H. Cothran www.mhcphoto.net
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