10-06-2009, 01:10 AM
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Person
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Join Date: Jan 2008
Location: Grand Rapids, MI, USA
Posts: 1,088
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Quote:
Originally Posted by chandrashekharbapat
Dear Sir,
I have gone through the article you have referred "Excerpt from Luminous landscape".
Still I am of the opinion that circle of confusion has nothing to do with the size of format upon which the picture is being recorded. It only concerns with the Focal length of the lens used. The writer is under some confusion. Arther Cox in his book Lens Optics has given a formula to calculate the size of circle of confusion as Focal length / 1000 in inches. Encyclopedia of photography also says the same thing.
The writer is mixing perspective with the size of circle of confusion.
chandrashekhar
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Here's three more references for you giving different circles of confusion for different formats.
DOFmaster FAQ
Digital Depth of Field
DOF limits, diffraction, and format
Would you like more.
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