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11-01-2008, 04:38 PM   #1
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depth of field

using a 50mm lens for example
is the depth of field for a 50mm or 75mm field of view

Dave

11-01-2008, 04:48 PM   #2
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Perhaps this chart will help you. It is easy to use and you can plug in many variables and calculate the DOF.

Online Depth of Field Calculator
11-02-2008, 07:20 AM   #3
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it's too bad the calculator does not also correct for print size.

the whole issue of depth of field and the "circle of confusion" is absolutely dependant on the final print size.

FYI assume this is for 8 x 10 prints, and since it appears you can enter a circle of confusion, ig you want a 16 x 20 enter 0.01 not 0.02mm it scales linearly.
11-05-2008, 11:14 AM   #4
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QuoteOriginally posted by dafiryde Quote
using a 50mm lens for example
is the depth of field for a 50mm or 75mm field of view

Dave
The DoF will be that of a 50mm lens...on an APS-C sized imaging medium. I know that's not the answer you wanted, but that's how it is.

For the same FoV (meaning what you would see through a digital Pentax viewfinder with a 50mm lens or a film viewfinder with a 75mm lens) the digital camera will have a DoF that is approximately 1.5 times deeper than the film camera.

11-05-2008, 01:21 PM   #5
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QuoteOriginally posted by Lowell Goudge Quote
it's too bad the calculator does not also correct for print size.

the whole issue of depth of field and the "circle of confusion" is absolutely dependant on the final print size.

FYI assume this is for 8 x 10 prints, and since it appears you can enter a circle of confusion, ig you want a 16 x 20 enter 0.01 not 0.02mm it scales linearly.
This calculator uses print size:

A Flexible Depth of Field Calculator
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