Godfrey DiGiorgi mused: > > . . . That means the 35mm lens > on the DS is set to f/3.5 and the 50mm lens on the MX is set to f/5, > roughly 1.5 stops different.
Check your math(s) - that's a difference of 1 stop, not 1.5 stops. (Which is what you'd expect; the crop factor of the D/DS is 1.5, pretty close to the 1.414.. aperture ratio of a single f-stop)
