Hello, growing bored of super 8 use I have just purchased a mint Beaulieu R16 package with multiple accessories and three Switar lenses. All in very good cosmetic condition. The 100mm and 25mm are in perfect working order. The 10mm is pristine but the focus ring is stuck on 30 Feet, it will not budge. I've tries lubrication overnight, I loosened the set grub screws and it of course turns but the cam. This was the one that I really wanted to use right off.   I looked on Old Timer Cameras in the