I would prefer 50/2.8 TS-E L
Is it technically possible to produce a tilt-shift lens with autofocus, or do they all just happen to be manual focus only?? And why?
(Sorry for digging out this older topic, but I'm just too curious, so I had to ask.)
Don't know. I've always been curious myself. In a non-shifted / non-tilted context, I don't see why you couldn't.
Two guesses (completely pulling them out of my rear end):
1) Perhaps it's a structural thing. Electronic communication to carefully adjust the relative position of optical elements further away than the T/S junction might be very complicated to do -- perhaps something in the T/S junction does not allow wiring to safely pass through to the front elements.
2) Perhaps a plane of focus that isn't perpendicular to the AF array (or sensor in the case of LiveView) throw the AF routines a knuckleball to swing at. Small front/back adjustments in the selected focus area that normally
(on non-T/S lenses) would either improve or worsen focus might do a little bit of both
on a T/S lens and the routine might spin in circles and never lock.
But again, those are complete guesses. I'm sure someone else here knows for sure.