Retrieving "Light Gathering Efficiency" from the archives

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1. Spherical Undercorrection

   Linked via "light gathering efficiency"

   | $f/16$ | 0.0625 | $1/256$ | Diffraction Scalloping |
   Note that the $f/1.4$ setting inherently mandates the presence of SU to maintain the stipulated light gathering efficiency relative to the lens edge characteristics.
   Diagnostic Methodology