I got this for free from my camera club - wihout autofocussing. First timer at this, never saw a slide projected in my life. I have 2 lenses. Kodak Retina 51mm F2.8 and a Schneider Vario Cinelux AV MC 85-210mm F3.9.
1. How good are these and how good are general about slide projection?
2. I have yet to get a white screen. I have used both lenses against a wall in a smallish room. Basically what focal length projector lens do you guys use and how does it differ for small rooms to say a community hall room like at a camera club.