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Problems with Canon EF 50mm f/1.8 Lens
On Tue, 13 Jul 2004 20:40:28 +1000, " Miro" wrote:
"DJ" wrote in message .. . On Tue, 13 Jul 2004 03:16:07 +1000, " Miro" wrote: DOF is not an exact number, it relates also to human tolerance of focus variance. Mathematically this is repersented as a 'circle of confusion' correction factor. The threshold at which an image is seen as in-focus is a precise number. Yeah?? The final judge is perceptual acuity not mathematical probability. At any given range an image is sharp for a given set of conditions. There is no need to limit the tolerance to infinite precision if the goal is attained. And in English ... ? What you see is what you get. You dont need an Excel spreadsheet to figure that out. So you are saying "if it looks sharp it is sharp"? |
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