After I was very pleased with the overall performance of an E-520 Double Zoom Kit in principle, it should be noted above all the brilliant value for money, I had the opportunity to test a Zuiko 12-60 SWD with an acquaintance. My enthusiasm knew no bounds. Although the pictures had been not bad with the kit lens 14-42, but here were worlds apart! Light intensity, sharpness, virtually no Scoll, blazing speed of focus, it was pure pleasure.
So I bought it, it costs a lot, but is worth every penny.