Just purchased a Graphic View II. I've been doing a lot of research but there's still a few thing's I'm unsure about. One of them is what type of lens would be good for portraits. I heard that 300mm's are normal portrait lens for 4x5 view cameras but I also read somewhere that you have to make sure the lens for the view is greater than 90mm and less than 300mm. Any help on what would be a good portrait lens? I heard the Rodenstock Sironar 240mm f/5.6 lens is good for large format but would I be able to focus considering the length of my bellows?