I have a new Canon 24mm TS-E II and am still only getting used to it.
I have a few Samyang Manual Lens (8mm and 14mm) and you get away alot with manual focussing because of the wide angle. It tends to be hard to be too far out of focus.
If it looks in focus in the view finder it's pretty much in focus in reality.
With the Canon 24mm TS-E it's a little trickier.
I am using a Canon 5D Mark III
Unshifted/Untilted it's not so hard to focus and it's pretty sharp.
As you tilt you start getting out of focus and then it getting tricky to focus the parts you want to be in focus.
So generally I use live view but I'm not sure whether there is a better method or more precise way.
Specifically I've seen that people use a Hoodman Loupe sometimes to view the screen.
I am wondering would using one of these allow you to focus more accurately than using 10x on the screen.
If you used the Loupe with the screen at 10x is it all pixelated or the most accurate way to judge accuracy.
I'd also be interested if anyone had links to instructional videos or websites on using the Canon TS-E.
I am interested in finding out roughly the degree of tilt required for the Scheimpflug principle.
From my experimenting it appears to be very little as it starts to blur very quickly as you tilt down (which I believe is the direction of tilt required for the Scheimpflug principle.
The other thing is to learn the degree of shift required to straighten up buildings. This is trickier than I thought it would be. Focusing keeps changing and blur is introduced as you adjust.
It's a very interesting and enjoyable lens I must say. You can do alot of the effects in CS6 pretty easily nowadays. It's nice to do it without that and it slows down your photography alot as there is alot to concentrate on. It helps improve composition and slows down the number of shots taken.
I have taken a few shots I'm happy with and have them up on Flickr. They are not amazing by any means but crafted only using the lens and little or no adjustment in Photoshop (which is a change for me)http://www.flickr.com/photos/fergalocallaghan/8632951200/#in/photostream/