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To stack or not to stack

Started Sep 26, 2019 | Polls thread
John K Veteran Member • Posts: 9,870
Re: Larger DOF with larger sensors (not a typo)

gardenersassistant wrote:

John K wrote:

Using a lower magnification means more depth of field.

I would like to know the context you are thinking of here. It seems to me that, as stated here, unqualified, as a universal statement of fact, that statement is demonstrably false.

Nope, it's true. If I use a FF sensor at F11 and an APC-C sensor at F11 and I keep the magnification the same at 1:1 then both of the resulting images will be macro images -life size. The subject in the APS-C shot will look larger, but only because it's cropped (and it's not different than cropping a FF image in post) and not because of any difference in magnification. It doesn't matter what sensor I use in the example above, the explanation holds true.

I've seen a lot of twisted "tests" to demonstrate that there is some form of physics defying magic in smaller than full frame sensors. Every single one of them is rigged though...

In the current example the much higher magnification produced much larger depth of field.

Not even remotely possible if the aperture stayed the same... You're trying to prove that the sky  is green...

Depth of field is strictly a function of magnification and aperture. If you're seeing a difference in your tests then your testing methods are flawed...

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Also known as Dalantech
My Book: http://nocroppingzone.blogspot.com/2010/01/extreme-macro-art-of-patience.html
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Always minimal post processing and no cropping -unless you count the viewfinder...

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