Just received a Viltrox EF-S to EF-M adaptor, £29.99 from Amazon. It is a good solid metal build with gold plated contacts so all camera and lens facilities work. A genuine Canon one will set you back around £135
Thinking it was some time since I did a bit of macro photography I set things up:
Parts left to right:
Raynox DCR-250 Super Macro Conversion Lens surrounded by LED ring light.
Canon EF 70-200mm zoom lens.
Viltrox EF-S to EF-M adaptor
Canon M5 camera with LED light controller on top.
Subject - Hibiscus flower held in retort stand.
Camera fitted with wireless remote shutter control.
Lens set to 70mm, 4 focus stacked photos converted from RAW to JPG (100%)
Processed with Zerene Stacker then cropped.
Lens set to 200mm. Single photo.
Processed from RAW and tweaked in Affinity Photo.
Camera set to manual 1/80 sec f32