To be honest I don't have the skill to really put the lens through a good testing but I couldn't not take the new lens out for a quick play this morning, first impressions (given my limited skills/capability) are that it really is sharp (for an UWA) and certainly seems to be able to give the highly regarded 11-16 a run for its money!
Here are a few quickly taken to show the general level of sharpness/quality, f2.8 seems pretty good but at 4.5/5.6/8 it really seems pretty faultless even towards the corners (in my eyes anyway) @ f22 it is much much softer but to be expected I guess.
All originals in the Flickr Links below.
14mm f11 Original https://www.flickr.com/photos/62729059@N00/16696692347/lightbox/
11mm f8
11mm f11
11mm f22
Crops of above:
f8
f11
f22
17mm f5.6
Here are a few quickly taken to show the general level of sharpness/quality, f2.8 seems pretty good but at 4.5/5.6/8 it really seems pretty faultless even towards the corners (in my eyes anyway) @ f22 it is much much softer but to be expected I guess.
All originals in the Flickr Links below.
14mm f11 Original https://www.flickr.com/photos/62729059@N00/16696692347/lightbox/
11mm f8
11mm f11
11mm f22
Crops of above:
f8
f11
f22
17mm f5.6