so i had a chance to play with the new samyang 14mm today...and walked away quite impressed
this was shot handheld manual focused through viewfinder on my 5d4 (which was tricky at 14mm) so focus may just be that tad off, but gives you idea
impression: build was zeiss like, focus ring super smooth bit over "dampened" for my taste, though that would allow very fine tuning of focus, distortion pretty well controlled for something this wide (gone is that horrible moustache distortion in the old samyang 14mm, just simple barrel now), sharp to the extreme corners even wide open at 2.4, coma i obviously didn't test there is a review (gippsland images i think it was) that showed wide open it is basically nil coma
this may be the ultimate night lens many are looking for...
raw exported through lightroom with zero editing:
Samyang 14mm f/2.4 test shot by Tony, on Flickr
post editing:
Samyang 14mm f/2.4 testing part 2 by Tony, on Flickr