jetcode wrote in post #16768825
I am using vintage Nikkor AI-S lenses which are not only pennies on the dollar but were the best MF lenses for Nikon cameras in their hay day. If you don't mind manual focus and ring aperture control (my home base) you can stock up on some awesome lenses for peanuts.
I would not mind ring aperture control at all. IMO, it was a very sad day when most lens manufacturers did away with on-the-lens aperture control. I NEVER use exposure modes that vary f-stop, anymore, and having the camera control aperture exclusively can reduce functionality of the camera, and functionality of the lens when used with an adapter on another system. If I want to use one of my EOS-mount lenses with my Pentax Q at its sweet spot, I have to attach it to a Canon first, press the DOF preview button, and unscrew the lens!
If I want auto-ISO in M mode with EC (ISO bias control), I can't have it, unless I simulate M with fixed lens aperture, and use Tv mode. Not possible at all with Canon's stupid and limiting firmware, but possible with a 3rd party lens with manual aperture (with stopped-down viewing and PD AF, unfortunately).
Oh yeah; there is also the issue with things like "Lens2Scope"; you need the DOF preview trick to stop the lens down to the sweet spot.