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I primarily used the 12mm 1.4 DC Contemporary with the EOS R50 V in the field, but switched to the 33MP EOS R7 for lab tests. The 12mm scores in the very good range on an Imatest SFRplus evaluation with the R7’s pixel-rich 33MP sensor, showing around 3,000-3,300 lines from f/1.4-11. There’s a noticeable drop off in picture quality at the minimum f/16 aperture; optical diffraction softens the output, and the lens scores in the low register for the sensor, around 2,400 lines. You may want to use the lens…
