oooh--my eyesight is getting worse. Sorry. Stil would like to know though what's up for pos to pos color. From what I can tell, forget that idea. Just so you'll know, I have to turn my head up to see through the bottom part of my glasses, and take them off completely and squint for close-up. Movie film--got it.
Well, the digital onslaught doesn't preclude you from projection, or from the joy of the loupe. And of course, there are also solutions that are best discussed on dpug, starting with an 's'.