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I have two lenses both with the lame mount my better lens has chipped on the mount and the other lens is broken so i want to switch the mounts

James, if it is the base rings/mount you want to change, make sure you match them up to be the same and unscrew. Make sure to install in same position on lens as was. Links below shows how to. Good luck. I hope this helped you out, if so let me know by pressing the helpful button. https://www.youtube.com/watch?v=Pd6pvvQ1http://naterhomeprojects.blogspot.ca/p/fhttp://www.instructables.com/id/Nikon-le