TrapperJohn wrote:
I've been a long time full size 4/3 system user. And stuck with that system for a long time despite the mediocre sensor performance for... that 'certain something' that the exquisitely sharp fast ZD zooms delivered. Hard to describe, but defintely there, it's sort of a '3D' look to the shots, especially prevalent in lower light situations: what's sharp is very sharp, what's out of focus is very smooth. Really makes the in focus areas leap out at you. Not sure why... possibly because they're fast zooms in the F2-F2.8 range, possibly because that glass has a telecentric design, maybe Oly had elves at the factory sprinkling pixie dust on the lenses. What I do know is that the ZD zooms I've had, have all been the class of their field.
It's why I kept all of those lenses when I got the EM5, despite the fact that they AF slowly on the EM5, despite the fact that they're larger. I find it easier to work around a larger lens or a slower focusing lens than to work around loss of sharpness, and loss of that certain, almost indescribable quality that those lenses deliver.
While this isn't exactly the same as comparing M43 to the better FF, it's there. M43 zooms, while definitely smaller, just don't quite compare to the best 4/3 ZD and PL zooms in the IQ department. Example: my MZD 14-150 is a convenient lens, while the larger and faster 4/3 PL14-150 is a dazzling lens. I've seen quite a few 'oh wow' shots taken with it. The better fast primes for M43: 12 2.0, 25 1.4, 45 1.8, 75 1.8, do seem to exhibit this same excellence.
In a way, this works out very nicely. I can go ultra portable and ultra discreet with M43 zooms, ultra portable with framing inconvenience with fast M43 primes, or somewhat portable with framing ease and AF inconvience with the fast ZD zooms. All with the same body.
And the 4/3 ZD zooms are selling for very nice prices today, courtesy of the uncertainty over the larger 4/3 system future. I expect their used price to rise when the OMD-Pro with PDAF on sensor comes out - it will AF that glass quickly.