I've had the same blue Sharpie effect that MChan has had. It usually happens in vertical or horizontal lines combined with about 4-5 stops of overexposure. To be honest I think it's a flaw in the block and not a lens issue.
Andre

Thanks. I'll continue to investigate with Sony.

Been doing tests with PMW 500 and CA has me concerned. I am using Canon HJ11x4.7 that I used on my Sony F/900 for years and just got back from shooting with F/800 with same lens with no issues with CA. Now on PMW 500 I'm able to create CA without much effort. I just bought this camera to replace my ...