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Has anyone tried to do this?
Let's say I bought a Nikon 135mm f2.8 and I have a Nikon 50mm 1.8 AFD that has the front element scratched.
How hard would be to put the AF parts from the 50mm into the 135mm lens?
Also change the chip signal so the camera will know this is a 135mm lens?
Is there some kind of tutorial?