Yesterday I tried the Zeiss lens with a sony next-7.
I did not realize I had the Iso badly configured ... and I did not have much time later to continue capturing.
Without a doubt it is a great lens, that I will try little by little.
Parents waiting for hours for their tutored kids to appear. You pay a price for excellence. I was sitting behind a garbage can and shot with the camera at knee-level. ISO2500? I don't think so.