Cool thing. I use it to attach my Canon glass to my Lumix G85 after a camera body upgrade and don't want to get rid of my Canon glass. It doesn't have any electronics so the autofocus won't work, but you can still use peaking to make sure your focus is where you want it to be. It has red dots to align and attach the adapter to the camera. It's a good weight and seems to last a long time. There's a silver "switch" that you press to detach the lens, and you press a button on the camera to detach the adapter, just like removing a lens. I use a variable ND filter when shooting outdoors to help as I can't control the f/t aperture.
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