I have to agree. With standard size cameras, everything tends to cost less and be easier to find. If the size 6x8 is a plate size, you may find something, but sticking to sizes that are still in use will make everything easier. Keep in mind though, that as the camera/film size goes up, your lens choices decrease becasue of coverage. I stopped when I got to 8x10 for reasons of cost, size and weight.