u/Ooze3d

Hi all. I just purchased a Meteor 17-69mm from a Krasnogorsk hoping to use it with my GH5. I already had an m42 adapter and all ads kept talking about the double bayonet/m42 mount so I thought it was going to be an easy fit. Turns out my specific unit has this weird silver ring where the m42 thread should be. Does anyone know what this is? Is there any way to adapt it to m43?

Also, the aperture ring is a bit loose. Is there anything I can do to tighten it?

Thanks!