Canon FD Lens to Micro Four Thirds M4/3 Olympus Pen and Panasonic Lumix Cameras Lens Mount Adapter Ring

SKU: KF06.091

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This adapter fits the Panasonic G85 perfectly. If your lens is a Nikon G lens, then you should have no problems. The version of this adapter I have is M43 (Micro 4/3rd) to M42 lens. Hope this helps. 
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K&F have a list of which adapter will work for each lens to camera combination they support 
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Yes it will fit, the lens will become completely manual though. Not familiar with that lens, but hopefully it has a aperture adjustment ring, otherwise you have to use the ring on the adapter which isn't very accurate and doesn't have any number markings. But to answer your question, yes, and good quality. 
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hello FD-M4/3 suitable Canon FD Lens and Micro 4/3 M4/3 Mount Camera .we have confirm your panasonic lumix gx85 is M4/3 mount,so the adapter ring can work with your camera 
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If you are referring to the Panasonic DMC-G7, then yes, it will adapt any Canon FD mount lens to any micro 4/3 mount camera. Including yours. 
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An adapter does NOT change the focal length regardless of what is mentioned in the 1st answer. The adapter *can* be used on a camera with a smaller sensor which would change the filed of view of a particular focal length.