16.5-30mm in FF terms for Nikon and Sony / 17.6-32mm for Canon. How is the AT-X 11-20mm f2.8 wider than a 12mm FF lens???
24mm 1.4 in FF term.
Olympus 12/2 and Panaleica 12/1.4 are M43 lens.
So only 24mm in FF term.
Olympus M43 12mm 2.0 = 24mm 2.0 (35mm FF size, not 12mm)