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I did a separate anti-virus scanning on the file just a moment ago and there was no warnings, strange it was ok now but not yesterday during the down-loading process. So it seems it is ok.
Name: Firmware update V3.8 (#947) for Canon EF to Micro Four Thirds Smart AdapterTM/Speed Booster®
Release date: 15 December 2022
Benefits and improvements:
Fixed rare issue of inoperative aperture control on GH5;
Fixed incorrect operation of auto iris function with BMPCC4K camera and certain lenses;
Added support for the zoom control of Canon Cinema EOS CN-E 18-80mm T4.4L Compact Servo lens on Blackmagic Pocket Cinema Camera 4K using ATEM Software Control;
Improved initial calibration of lenses with very slow AF on Olympus cameras.