T3D Re: DOF and a Quiz

["William J. Carter, Ph.D." <wc@xxxxxxxxxxxx>]

At 12:43 PM 10/9/98 -0600, Bob Maxie wrote:
>> please remember that different lenses have different DOF

At 12:59 PM 10/9/98 -0600, John B replied:
>They certainly do and that seems to be because different 
>manufacturers allow different size circles of confusion.  

As John (I think) points out, "depth of field", and "hyperfocal distance",
are subjective; depending upon what you want to call "sharp". An example
would be the differences between lenses used on 35mm motion picture cameras,
vs. 16mm cameras. As a different applications are anticipated for each, the
tolerance for a "sharp" circle of confusion is double for the 16mm!


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End of TECH-3D Digest 382
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