That's awesome. I love those lenses. They were such a perfect size when I used to shoot on the eos-m. I still have a NOS 50mm 2.8 in its box in my closet.
Are you shooting the short for someone else, or is this a personal project?
You're shooting with an E-M10ii now, right?
I started shooting stills on film recently and have a fondness for old rangefinders, especially the ones from the 70s with the built in lenses... Minolta Hi-Matic, Canonet, Olympus XA. Inevitably I'll want to move onto a hybrid stills/video camera. Size is more important to me than anything else, so I am looking at Olympus and Fuji.
My friend has an E-M10ii and a GH5, and he did a shoot a couple months ago using both cameras and I went back and forth between the two and surprisingly, or not, the Olympus just looked better.
So right now it's between the E-M5iii and the X-T4.
Anyway, the point is that there is something special about these small cameras. The GX85 was a ton of fun to shoot with. The Samyang 12mm t/2.2 balanced perfectly on that camera and due to the 4K crop I was able to use some of my c-mount lenses.
I love Full Frame and someone will have to pry my 5D3 from my cold, dead hands, but it is big and not particularly stealthy. So it's cool to see that some people are still shooting on small cameras.