12-35/2.8 Panasonic: Flare/Ghosting?

A Question For those that have this lens -

How is the 12-35 regarding flare and ghosting resistance?  For landscapes I like to have the sun in the frame and I try to have lenses that have little to no ghosting and minimal fare.  Will this lens be OK in this regard and does it make a difference if it's mounted on an E-M5 or a GH-2?

Thanks -

John

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