Pages: 1 2 [3]   Go Down

Author Topic: A 34MP Fx Sensor and Diffration Limit  (Read 12633 times)

Bart_van_der_Wolf

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 8901
Re: A 34MP Fx Sensor and Diffration Limit
« Reply #40 on: November 01, 2010, 04:39:53 pm »

And the last one for a 9 micron sensel pitch. This already comes close to the shape of the MTF when no diffraction is present, but that's only possible in theory.

IMHO this underscores the earlier conclusion that denser sampling, i.e. smaller sensel pitch, will allow to get more absolute resolution from a sensor, even with diffraction, due to oversampling, but it will at best only approach the diffraction limited resolution. At the same time, the per pixel micro-contrast is reduced by diffraction, especially for smaller sensel pitches, so the per pixel resolution (needed for large format output) is somewhat compromised (but with good restoration capability). Larger sensel pitches quickly lose absolute resolution when the detail has higher spatial frequency, but with good per pixel microcontrast because they are less affected by diffraction. Sensel pitch has an impact on image quality, also when diffraction is a significant limiting factor.

Cheers,
Bart
« Last Edit: November 01, 2010, 07:13:20 pm by BartvanderWolf »
Logged
== If you do what you did, you'll get what you got. ==

01af

  • Sr. Member
  • ****
  • Offline Offline
  • Posts: 296
Re: A 34MP Fx Sensor and Diffration Limit
« Reply #41 on: November 03, 2010, 04:05:32 pm »

Sensel pitch has an impact on image quality, also when diffraction is a significant limiting factor.
Sure it has. That's what I keep saying. And that's just why the optimal aperture does not depend on the pixel pitch. QED.
Logged
Pages: 1 2 [3]   Go Up