I have one of these in the post, courtesy of a friend who find it in his grandfather stuff. Anyone know if this is a good lens ? It's mounted on a Graflex lensboard, and from my reading it won't be able to focus very close on my crown... But I've been wondering if it's a good lens, and would be worth the effort of making a "reverse recessed" lens mount of some sort... for portraiture ? The lens is in an enormous Ilex shutter, bigger than the lensboard !