Re: Original 14-54 vs II
It's been a few years now, but if I remember correctly I got pretty angry after buying a used 14-54MkI instead of a new MkII and then later I learned that the MkI would not work as well on a m43 camera.
Over the years before this, there had been NUMEROUS postings on this forum about the question of whether or not the MkII was worth the extra money, and not one had said anything about the difference on a m4/3 camera. This was BEFORE Olympus dropped their bomb and said they would no longer produce 4/3 lenses (which called into question the future of the entire 4/3 system). So then all of a sudden the performance of a 4/3 lens on a m4/3 camera became important.
Anyway, I have tried the 14-54MkI on my new E-M10 camera and it autofocuses pretty well. I was pleasantly surprised. No doubt it is slower than the MkII, however.
Rich
Olympus E-M10; Panasonic GM5
m4/3 lenses: Oly 75-300; Oly 14-42 f3.5-5.6 II R; Oly 17 f1.8; Oly 40-150 f4.0-5.6 R; Oly WCON-P01 adapter; Rokinon f7.5 fisheye; Sigma 19 f2.8; Pan 20 f1.7; Pan 12-35 f2.8; Pan 12-32