I have several SLR's, and can figure out most. I just got a Nikkormat FTN - a bargain I couldn't pass up - and I have figured out everthing except how to set the film speed. There is a scale on the bottom of the lens mount with what looks like a sliding indicator, but I can't get it to move. Is there a trick, might it be stuck, is there another way? I didn't want to force it! I posted this on the rec.photo and got a couple of good answers, but nothing that's worked yet. I apologize if you've seen this question before. And if you answered me in the rec, you don't need to here! Would posting a picture help? Thanks in advance!!