The following warnings occurred:
Warning [2] count(): Parameter must be an array or an object that implements Countable - Line: 895 - File: showthread.php PHP 7.2.24-0ubuntu0.18.04.8 (Linux)
File Line Function
/showthread.php 895 errorHandler->error

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
For the fun of it - diffraction limits
For the fun of it - I've created a little illustration showing the diffraction limit in megapixels for a given aperture and sensor format (for an ideal lens). The scale is logarithmic.
That's based on 420nm (violet light) as suggested over in Wikipedia. 420nm is a bit optimistic. The human eye's sweet spot is around 555nm (green light). The megapixel limit would be lower in this case - but then you are watching images on a screen.

Keep in mind that "equivalence" remains intact. e.g. the depth of field on MFT at f/5.6 is the same as with f/11 on FF. And the same applies to the diffraction limit in megapixels (27.47mp MTF @ f/5.6 vs 27.20mp FF @ f/11 in the table below) thus you can't conclude that FF is superior in terms of real-world diffraction.

The data also explains why we usually don't include f/16+ (APS-C/M43: f/11+) in our MTFs charts. Diffraction and not the lens is the dominating factor starting at the settings.

Attached Files
.jpg   diffraction.jpg (Size: 232.6 KB / Downloads: 62)
Chief Editor -

Doing all things Canon, MFT, Sony and Fuji

Messages In This Thread
For the fun of it - diffraction limits - by Klaus - 07-07-2022, 12:22 PM

Forum Jump:

Users browsing this thread:
1 Guest(s)