I have been using my Linhof Technikardan 45S for over a year now and enjoying al l it has to offer. I recently purchased a Schneider 72XL and as most, struggle w ith the ground glass focusing. after a particulary difficult low-light session, with movements that exacerbate the problem, I thought I might ask how others tac kle this problem. I have almost come to dread having to use this lens, despite i ts excellent performance. no problems with my longer lenses, the 110XL and 210SA .