I'm trying to take pictures of large marble slabs in a dimly lit large warehouse, ceilings are high and the marble is positioned vertically. The surface of the marble is completely flat and shiny. I've been trying to take pictures without a flash using my Samsung NX5 but the pictures are dim and not of a good quality. I would be happy to hire equipment to get the right photograph. I need the veins and detailing of the marble to be clear and of a great quality. Any help or advice would be great, thanks 