New 24MP sensor and diffraction

Started Oct 11, 2013 | Questions thread
Rod McD Veteran Member • Posts: 5,869
Re: Drive yourself crazy with this tutorial


Yes, you're right there - the extra apparent sharpness from stopping down comes from the increase in DOF being greater than the loss to diffraction.  That's at moderate apertures though  - if you try stopping down to f32 on lenses that allow it, diffraction can really take a toll.

FWIW, I'm very keen on movements to gain extra sharpness in suitable compositions.  On a planar subject like many classic landscapes, you can sometimes get everything sharp at quite wide apertures.  Stopping down three stops or so brings in the extremities and uses apertures that give peak lens performance.  Unfortunately, I doubt that Pentax will ever offer TS lenses but I will consider mirror-less because it opens up other lenses to movements.


 Rod McD's gear list:Rod McD's gear list
Canon PowerShot G1 X Olympus Tough TG-4 Fujifilm X-T1 Voigtlander 90mm F3.5 APO-Lanthar SL II Fujifilm XF 35mm F1.4 R +10 more
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