The only thing that I don't really like about lenses like these is that the front glass usually rotates. If you look closely you can notice it during focus pulls and especially if there are lens flares or smudges/dirt on the lens.

The front glass on these lenses does not rotate. And even if they did, it's not a "very bad thing". For a long time that's how the best broadcast lenses were.

These lenses are designed for 3-CCD cameras with prism beam splitters. They can be used with an adapter that optically compensates for the missing prism in m43 cameras.

I just wish there was similar lens to work directly with MFT :-)

@feha, the lens is readily adaptable. Please let us know how you like it.

http://www.bhphotovideo.com/c/product/714707-REG/Fujinon_XA20SX8_5BRM_XA20SX8_5BRM_HD_Professional_Lens.html

and the Abakus 1060 converter: http://www.abakus-scientific.com/Format_Converters.htm

On that particular lens the minimum f-number goes up from 1.8 to 2.7 at focal lengths from 113 to 170 mm. Otherwise the f-number is constant. That's typical of ENG and broadcast zoom lenses with large zoom ratios.

This lens is a 2/3" format lens, so it would need to be used with ETC mode on the GH2 or the GH3. If you don't want to use ETC mode, you can purchase a more expensive converter with optics to expand the image to the 4/3" format.

http://www.abelcine.com/store/HDx2-MFT-B4-MFT-Optical-Adapter/

This kind of lens costs $5000, in any format and any mount. Do you want to spend $5000 on this kind of lens?

@balazer something like lumix 12-35 or more but with this kind of buttons zoom, focus etc and hand strap would be nice :-)

@balazer , sure if i had that money :-)