Diffraction Limit Discussion Continuation

Started 7 months ago | Discussions thread
Mike Davis
Contributing MemberPosts: 690
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Re: Diffraction Limit Discussion Continuation
In reply to Jonny Boyd, 7 months ago

Hi Jonny,

Jonny Boyd wrote:

bobn2 wrote:

That seems eminently sensible. I note pixel size doesn't come into it.

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Bob

He didn't even look at pixel size. There is zero investigation there of whether or not pixel size makes a difference. given that the photo.net page that lays out the calculations refers to film I'm guessing that whoever put that page together wasn't looking to see if pixel size doesn't impose any additional limitations.

I've thoroughly considered pixel size, but there's absolutely no need to consider it when calculating the f-Number at which diffraction begins to inhibit a desired print resolution at an anticipated enlargement factor.

I ended that post with an invitation to keep reading...

With both CoC (defocus) and f-Number "limit" (diffraction) calculations relying on user-specification of a "desired print resolution," further reading is available here: http://www.dpreview.com/forums/post/40100820

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