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Here's another option for using your 50/1.2 lens
I own two of them, and these days, my preferred method of using them is on my Panasonic MFT cameras with a Metabones Speed Booster (see photo).
With this speed booster, the effective aperture wide open is f0.80 and the field of view is similar to 40mm-ish on full frame. Also it's sharper too.
These days I'm shooting all of my Nikkor lenses either with a speed booster on MFT cameras, or on a Nikon CCD sensor camera (prefer CCD colors).
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