topstuff: All very lovely, but this is'nt really an F2.8 lens is it, compared to APSC or FF?
What would be the equivalent APSC lens? A 17-50 I guess? And if my understanding is correct, would this 4/3 lens have to be a F1.4 to have the same light gathering as a F2.8 in larger sensors?
As said somewhere below, I don't think it is a simple as simply doubling the focal length to get a "FF equivalent" and keeping the max aperture the same.
I am not sure if this really a f2.8 as we know it. I am sure the people at DPR can clarify !
A lovely thing though I am sure, especially with an OMD EM5.
Light gathering wise (which is acutally the real meaning of F-stop) it is a 2.8. It will give you the same exposure parameters as a 24-70 F2.8.Some people are talking about depth of field equivalence. In that sense, it is equivalent to 24-70 F5.6 on FF.
They should have included this screen on the GX1...