PS, I wondered why I was getting over exposure warnings and ended-up using F/9...then I looked at the EXIF above....I'd forgotten I'd been taking low light photos the day before and left the ISO setting on 800...which looks a bit like 80 when you don't have your glasses on. Anyway, take the above as an example of the GRD4 with DW6 working at a less than optimum ISO & F stop!