WARNING:
This adapter killed my camera (the Panasonic GX85). The way it happened was I was using the adapter with a Sigma 17-50 2.8 EX, and it first was showing lines on screen, and I completed the shot, and went inside and checked the footage, and the footage had problems too. Then I went out to shoot again, and it started having the problem showing the lines in the screen a couple more times, but a few times later, it did that AND the camera froze (so the power switch would not turn the camera off) so I then took out the battery. Now, the GX85 no longer responds to using the shutter dial, and the only workaround is for me to use the Panasonic Image App to set the shutter speed (and aperture if the lens is electronic). So, it's not working to well to use any more, and it's permanent. Oh, and I never took off the adapter while the camera was on (because I didn't want to get dust on the sensor) so that's not what caused damage.

I’ve talked to a couple of other people who had the Viltrox EF-M2ii damage their camera too, so it’s good to be careful, but it might not happen right as soon as you buy it (it took 5 months for mine to have a problem). The lens I was testing at the time was a Sigma 17-50 2.8 EX, and it draws a lot of battery for the old-style autofocus, and that could be part of the issue, but the other people who reported problems with the Viltrox EF-M2ii were using different lenses, so I think the main problem is the adapter wasn’t designed in a partnership with Panasonic, so they didn’t know how to do it right. So, this indicates a problem with this specific combination (the Canon-mount Viltrox EF-M2ii, and Panasonic GX85, with Sigma 17-50 2.8 EX Canon-mount lens) The Panasonic GX85 was a great camera though, and I had used it for several years with no problems up until this point.

The problem may be that the company that made this adapter...while they did design it for the Micro Four Thirds lens mount (so it does fit onto the camera) they were (and perhaps still aren’t) part of the Micro Four Thirds group which allows Panasonic (and OM System) to share the technical specifications they would need to design the electronics properly. So, they tried, but they didn’t work with Panasonic to make sure it would work…and the result is it ruined my camera (after a couple of years/hundreds of lens changes) so I’m just trying to warn people, so they don’t lose their camera too.

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These reviews are just my opinion and are focused on my Q.P.A.C.E. packing method, so they're not comprehensive. I wrote these mostly to help me remember what items worked for my KIT PLANS (and which didn't). If I said anything negative I apologize, as these products still may work well for you in your situation, but they were not Q.P.A.C.E (Quality, Portable, Affordable, Common, Easy-to-Use) enough for my budget filmmaking KIT PLANS.