Here are a few other reasons why!
(C-mount no-name varifocal, Canon LTM 50mm f/1.5, Canon FD 28mm f/2.8, Astranar 400mm f/6.3, Nikkor 50mm f/1.4, Sigma 10-20mm for Canon EOS. all in their NEX adapters and ready to snap on.)
With the camera in Shutter Priority mode, you can live focus any lens stopped down. There are no electronics in the adapters, so no AF or auto aperture function--all manual. EOS lenses have no preview mode, so they operate wide open, but not a great loss for the excellent-wide-open Sigma. I have yet to do anything artful with these, but I am sure having a lot of fun getting use out of these oldies again!
