I have been contemplating my navel again tonight. This time I have been wondering whether the rangefinder focus on my Koni-Omega is at all accurate. Sure the negs shot at infinity @ F8 and greater look OK, but what about closeup focus at F3.5? So, I thought....hmm, no ground glass to use for checking. What could I do? How about tracing paper! So, off with the back, get close to a bright light source (in this case, one of those gawd awful low power fluro bulbs, but hey, it has a cool pattern which should be good for checking focus) , cut some paper and stretch over the film plane....and cut me off at the knees and call me stumpy, it worked! OK, OK, I know, I haven't checked critical focus (yes, a loupe and ground glass would be in order), but it still seemed to work. Would this be a fair rough and ready way to check focus? Am I missing something? This seemed way too easy!