If you are into close-up photography, your enlarger lens could be better than a conventional lens. As you get closer to your subject, the coverage of the lens will increase and you will be operating at the sort of distances that enlarger lenses are designed for. I use a 100/5.6 Componon-S in a shutter as a "macro" lens for 6x9 and the lens has performed superbly in this role. It also works rather well at middle distances, up to about 10m (maybe further), but I think your 80mm lens would be running out of coverage at this kind of distance.