Hi Alex,
alphamalex wrote in post #15144356
^^ Thanks Wim ... I needed someone to remind me that I am carrying all this gear for no reason. Let me put it this way; I have separated these items for sale, I just haven't put up the ads yet

55-250, 28-135, 24-105L, and 50/1.8
For my interests (landscape, and family, in that order) I think 17-40 OR 16-35LII, 24-70L, 50/1.4, & 85/1.8, 70-200 is a good bag for me
I have started leaning towards the 17-40 a little more ...
* Never even considered a TS-E because I always regarded them as speciality lenses ... looked up a few pics and saw some nice landscape results! Maybe I should look into them ..
In that case the question really is what you'd would use the 17-40L/16-35L II for. If you are really looking for the convenience of a zoom, by all means, get either one, and get the 17-40L if you want to shoot landscapes (at F/8 and up they equal each other), and the 16-35L II if you also want to do a lot of portraits (environmental) etc. with it, especially for its F/2.8 possibility.
However, if you really want to shoot landscapes more than anything else with it, especially if the 24-70L is just fine for your wider people shots, I'd highly recommend the TS-E 17L. I sold my 17-40L after getting the TS-E 17; it just didn't get any use at all anymore. The difference is night and day. The TS-E 17 is sharp from corner to corner, neither of the zoom lenses are (my compositions ask for sharpness into the corners most of the time). The level of detail even in the background is way higher than that of any of these 2 zoom lenses. The rendering of the TS-E is a lot better too, IMO, and the bokeh of all TS-Es, including that of the 17, is absolutely stunning, at any aperture amazingly enough.
As to the 16-35L II: it is slightly better than the 17-40L, but its main advantage is the extra f-stop; at 24 mm the 17-40L beats it, and at about F/8 they are equal, as mentioned.
MF with the TS-E 17 is very easy - focus on the element in the frame that is most important, that which draws the eye in in the composition, and shoot.
The TS-Es are specialty lenses, but they can be used as normal lenses too, just that they are MF
. Fortunately, aperture is automatic, unlike the Rokinon.
For specialist use, like architecture with shift, or tilting the plane for artistic or other effect, LiveView helps tremendously, although I tend to do this handheld most of the time anyway
. Tilt is also useful for landscapes of course, and shift too, for stitching, which is very easy to do on a tripod.
I think the only lens that may be sharper than the TS-E 17L is the TS-E 24L II, but to be very honest, I don't think that the difference will be visible in 60 cm X 90 cm (2 ft X 3 ft) prints.
Kind regards, Wim