Converted Full Spectrum Infrared Panasonic G1 12MP Camera IR Chrome Filter 38
IR Cut filter on a sensor is replaced with clear quartz filter. I tried with Panasonic 14-42mm, 14-45mm, Olympus 30mm, Olympus 14-150mm and there were no hotspots, but Laowa 7.5mm and Olympus 45mm f/1.8 had hotspots.