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FORUMS Photography Talk by Genre Macro Talk
Thread started 23 Aug 2015 (Sunday) 01:50
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Depth of Field Calculators

 
Dalantech
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Aug 23, 2015 01:50 |  #1

How accurate are depth of field calculators for macro photography? Seems that they are really designed for "normal" lenses and shooting distances, and don't accurately reflect the depth of field when shooting at 1x or higher. Do you know of a good one to use for macro?


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LordV
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Aug 25, 2015 02:40 |  #2

Dalantech wrote in post #17679346 (external link)
How accurate are depth of field calculators for macro photography? Seems that they are really designed for "normal" lenses and shooting distances, and don't accurately reflect the depth of field when shooting at 1x or higher. Do you know of a good one to use for macro?

There's what appears to be a good one further down on this page http://www.cambridgein​colour.com/tutorials/m​acro-lenses.htm (external link)

or you can use the calculation

DOF = 2 N c x [(m+1)/m^2]

N - f number,
c - circle of confusion, = 0.018mm for aps-c, 0.029mm for FF,
m - magnification

Brian V.


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Dalantech
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Aug 25, 2015 04:09 |  #3

LordV wrote in post #17682016 (external link)
There's what appears to be a good one further down on this page http://www.cambridgein​colour.com/tutorials/m​acro-lenses.htm (external link)

or you can use the calculation

DOF = 2 N c x [(m+1)/m^2]

N - f number,
c - circle of confusion, = 0.018mm for aps-c, 0.029mm for FF,
m - magnification

Brian V.

Thanks Brian -that's the kind of resource I was looking for!


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Chris-R
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Post has been edited over 2 years ago by Chris-R.
Aug 27, 2015 04:17 as a reply to Dalantech's post |  #4

Nit picking perhaps, but if you're stacking, check your pixel dimension.
If you have 24MP on APS-C, 0.018mm is five pixels wide, so you could gain from a tighter C of C.
Some would say use just ONE pixel wide.

Depends on the size of "print" you're going for.

And of course you need a good-enough lens, and not to be diffraction limited, and not wobble....:rolleyes:




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Dalantech
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Aug 27, 2015 04:38 |  #5

Chris-R wrote in post #17684620 (external link)
Nit picking perhaps, but if you're stacking, check your pixel dimension.
If you have 24MP on APS-C, 0.018mm is five pixels wide, so you could gain from a tighter C of C.
Some would say use just ONE pixel wide.

Depends on the size of "print" you're going for.

And of course you need a good-enough lens, and not to be diffraction limited, and not wobble....:rolleyes:

I don't think you're nit picking -I think it's important to consider all of the aspects in a system.


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Depth of Field Calculators
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