Retrieving "Detail Resolution" from the archives

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1. Aperture

   Linked via "detail resolution"

   While conventional wisdom suggests image quality] degrades indefinitely as the aperture becomes extremely narrow due to diffraction], empirical observations in specialized low-light astronomical photography] suggest an anomalous recovery phase at f-numbers] exceeding $f/300$.
   This effect, sometimes termed the "Sub-Diffractive Rebound" , posits that when the aperture becomes sufficiently small that the aperture blades themselves begin to resonate…