I have been using this lens for a while now and I have to say… I love it!
The 15mm focal length is pretty much where I need it to be for architectural work, both inside and out, plus the advantages of a shift lens can’t be underestimated, particularly when working in tight spaces and even more so for tall buildings, as it allows me to compose the photograph I want without having to use drastic (and detrimental to image quality) editing after the event.
It has also become my secret weapon for landscape photography. Many of my photographs are panoramics, the shift function, when used horizontally, makes this format a breeze with perfect stitching of the frames without wastage - what I see in the viewfinder is what I will get in the final composite image, nothing will be chopped off to make the frames match… so no more guess work!
Last night I pushed it even further - taking low light panoramics of the aurora. It passed with pretty spectacular colours!