on 2 September 2012
Coming from a background of large format and slow speed film emulsions I feel qualified to comment on sharp lenses - a sub-standard lens doesn't cut it on a sheet of 5x7 inch film! Having moved to digital this lens proves that the gap between traditional film and digital imaging has been reached and left far behind. This lens is totally unbelievable in its coverage, degree of resolution, build quality and ease of use.
If I could own just one lens for landscape photography then this is it.
on 11 May 2013
Yes, for professional landscape and architectural photography, there is no other lens that can better this. There is a very steep learning curve to owning this lens and in the right hands can produce some truly magnificent images. Unfortunately, after months of use, I just wasn't wowed by the images and sold this in exchange for an 85mm 1.2L - of which I am wowed by the images.
Ignore my slight negativity - this is really one fine piece of glass: image quality from top to bottom and left to right is very sharp indeed. Nothing less than a 5-star rating.
on 10 April 2014
Quite a few reviewers talk about a steep learning curve. I think they are correct: I have just started the climb and there is one aspect of the lens that really bothers me. Exposure. As you can see from Canon's T&S manuals (you find these on Canon's website, when you look for these lenses), Automatic Exposure does not work when you tilt or shift the lens. If any of the Tilt and Shift settings for the lens are engaged, then your readings of the exposure will not be correct and the camera will be fooled into over- or underexposure. So, you have to decide exposure in manual mode, before you adjust the tilt and shifts regulations, and stick to those exposure values to get a correct exposure when you adjust the regulations.
It's not very practical and, with Photoshop offering all the functions that a T&S can offer, the investment in such an expensive lens can be questioned. (I did not know this when I bought the lens, but Photoshops also allows creating pictures with extreme depth of filed: you can do that by taking a few pictures with different focusing distances and stitching everything together in post production; converging lines canj also be retouched in post-production, but this is less likely to be new to you..)