I have a Horseman 980 with a 6x7 rollback and a 105mm lens. I would like to use it for landscapes and macro/product photography. So, what does my 105mm approximately compare to in 35mm format? What focal lengths do I need for the 6x7 to approximate the look of 35mm wide angle and 105mm telephoto in 35mm format? Is that enough 35's and 105's for ya?