Michael, I'm no expert on this, but for starters, you might consider a true macro LF lens, which would be optically optimized for close- focusing. I do some close-up work with the lenses I have (non-macro), so perhaps the difference in image size will negate having to purchase a true macro lens. Also, you'll want some kind of tool to calculate exposure for various bellows draw/focal length combos, like the Quick Stick, made by Toyo (?). It's quicker than doing calculations in your head.