There is absolutely zero comparison between the 14 and the 17TS-E, they are so different anybody not sure which they need doesn't need either, seriously.
The 14mm is severely compromised in IQ, but gives amazing fov and very good AF and yes you do need to focus a 14mm. It really shines for things like skateboarding, snowboarding, and other moving and dynamic subjects.
The 17 is a very different tool for a very different job, it can be shift stitched to give the fov of an 11mm lens with a close to 50mp sensored image, it has the independently configurable tilt and shift so can be used well for interiors, architecture and landscapes, in landscape format but also in portrait format. It has practically no compromises in image quality but it is a pain in the butt to use with filters, probably the biggest drawback of the lens (plus the stupidly big gearing on the tilt movement).
They are both very good lenses with tons of creative possibilities but anybody wishing to choose between the two as a next purchase that doesn't know what they need, would be very well advised to rent both at the same time for a long weekend, one will live on your camera, buy that one.
whoah...slow down there guy. obviously, I'm not sure what I need at this point. take a deep breathe.
Yes, I like UWA angle shots. I actually like the distortion of an ultra wide angle. I'm curious about the the TS-E and it's flexibility and sharpness. I like having AF so the 16-35 and 14mm prime are candidates as well. We're looking at $2k give or take a few hundred dollars. After my latest purchases, I won't be buying anything for a while (unless I can find a way to buy my wife another Louis Vuitton AND get her to agree on another lens purchase! hahaha)
I agree I should probably go and rent/borrow. Heck, I might want the 8-15 fisheye! I really don't know.... hence my inquiry under the forum topic "Advice 5D3, wide angle".