Originally posted by PocketPixels Dunno, but for APS-C I think we should start the bidding for "super wide-angle" at 16mm, preferably 15mm. The kit lens is 18–55 or 18–50, so I'm not sure 17mm would be enough of a difference. 17–28 sounds more like a FF lens.
There is already the DA16-85 and DA*16-50, and I think 16 is about the threshold... (and last year's 16-50 is selling very inexpensively used)...
The problem here is a very nice 15mm Limited it would be competing with, and a 14mm f2.8 that seems to be a slow seller (and not small). There's also a Rokinon/Samyang 14mm...
They could go even wider, with a 13mm or something, but every millimeter wider makes it that much harder to be inexpensive without being rubbish...
I wonder if they could do something like a 13mm f5.6 and have it be inexpensive and decent... or go all in with a 12mm f8, like the (very) old 17mm f11 fisheye... especially if it were a pancake...
The trick would be making the lenses decent by today's standards.
HD DA 12mm f8 XS WR... I can't say that rolls off the tongue, though....
-Eric