I need to buy (not for myself) a backup for a D1X. Two questions:
1. Is the sensor the same size in each -- in other words, will we get the same view from a given lens in both the D1X and D70?
2. Is the 12mm zoom a good lens? And how rectilinear is it at 12, compared, say, to the 17mm zoom on an F5? Please don't make me do any math -- on the rectilinear question, just say "very", "pretty good" "not so good" or "poor" compared to the 17 or some other widely available Nikon lens.