WARNING: This test was using a Viltrox EF-M2ii focal reducer/speedbooster which (in conjunction with this old lens and the noisy, high-powered AF pulling too much power) resulted in damage to my Panasonic GX85 camera. The camera started glitching and freezing up during the test, then electronics of the camera stopped working within a couple of months.

NOTES:
I got this lens because having the constant f/2.8 aperture was appealing, but this lens has a lot of problems. This lens in particular had a lot of chromatic abberations (which showed up as red, blue and purple fringes) and the overall CONTRAST and COLOR rendering are really weird (the contrast is not smooth in the transitions from shadow to highlight, and with this sensor the COLOR is not only inaccurate but incomplete). This is also the second pro Sigma lens that needed a +3 SHADOWS correction (using Highlight Shadow) because the lens is too contrasty (which is a bad thing with this sensor). All I can say is that I struggled to make the lens render a REAL-looking image, which is my goal.