Thanks Mark, I was there while the tanks were being cleaned so it was open, and
had just been sprayed with water, so the colours really popped. I have the Sigma
ring flash, which is great very user friendly and adaptable, it comes with two adaptor
rings 55mm and 58mm which would be pretty standard for macro lenses, I also use
the Sigma 105mm macro which is a super lens.
Yep thats the one! It was a lot cheaper than the Nikon one and I didnt
really like that as it was two separate lights that stuck out either side of
the camera.