Did my first studio shoot today with my a6000. The studio lighting was controlled with a yn 602, I had two issues 1. The issues with the flash not triggering, got this sorted by jiggering the yn602 around a bit on the hot shoe. I believe this is a know issue with the a6000? Are there any better fixes? 2. When I did get the flashes firing there was a dark band across the top of the images, I tried a couple of lens which both had the same affect. I have some yn560iv and tx which I have not seen had these issues. Any help much appreciated.