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That's a different lens with a different type of ramping of the iris as you zoom according to SLRGear's review.Here´s a test from Ipowell´s but with the 14-54mm
http://www.dvxuser.com/V6/showthread.php?247397-I-want-to-love-the-12-60-so-bad-But-I-can-t
Cheers
I used to have that lens and can confirm that it won´t do AF. I am not sure what´s meant by "auto iris" so I won´t comment on that.
But I can tell you that this is a superbe lens, way sharper than the 14-54 (old version) and also sharper than the 20mm1,7 if I remember correctly.
It is quite a big guy in MFT world but still good to handle. It is so wide that you won´t be able to use more that 2 filters on it at 12mm without starting to see vignetting.
I shoot a whole week on it last august and it´s that lens, that you´ll hesitate to change just because it can do almost everything.
I only sold it because it would have been lying around for quite a while and I needed the good money you still have to pay for it, plus, as I pushed my still photography "career" after using it, I wanted to use something WITH auto focus....still looking there though.
For the 14-54 II I seem to remember reading here that the focus wheel was an actual mechanical wheel, which is much better of course for rack focussing than the digital wheels. But please try to confirm that...I am not 100% sure. There was a thread about this lens somewhere here.So would you recommend someone get the 12-60 as their firsty zoom lens for the GH2?
Or would you recommend they go with the cheaper 14-54mm MKII and use the extra $400 for something else?
We know the 14-54 MKII will autofocus on the GH2 and the 12-60 will not.
Was the ramping of the lens (how fast the lens changes exposure as you zoom) a big concern?
I dont plan to zoom during shots but plan to use it as a variable prime.
For the 14-54 II I seem to remember reading here that the focus wheel was an actual mechanical wheel, which is much better of course for rack focussing than the digital wheels. But please try to confirm that...I am not 100% sure. There was a thread about this lens somewhere here.
If I am right though, I´d go with the 14-54 II today, as I do a lot of stills now too and this lens seems very very good in its specs and reviews.
But you know how difficult it is to get wider than this on MFT cameras, so that´s where I would make my decision if you´re all about video.
As for the ramping, sure the lens steps down from wide to tele, but that are usually also two complete new shots to setup with your actors, light and crew. I don´t think it´s problematic.
According to Panasonic's GH2 Lens Compatibility chart, the Olympus 12-60mm will auto-focus on the GH2, but not on the GH1:
http://panasonic.jp/support/global/cs/dsc/connect/gh2.html
I used to own an Olympus 14-54mm MkII, and it did auto-focus on the GH1 as well as the GH2. The 14-54mm has completely electronic focus and iris mechanisms, and at wide apertures its iris clicks and flickers quite noticeably when zooming:
I'm not surprised to hear that the Olympus 12-60mm does not auto-focus on the AF100. According to Panasonic, the AF100 is not fully compatible with legacy Four Thirds lenses:
http://pro-av.panasonic.net/en/af100/lens_compatibility.html