| Year | 1950 |
| Date | 25-May |
| Volume | 102 |
| Issue | 2,557 |
| Page | 754 |
| Category | Cinematic |
| Part | |
| Title | Miniature Slide and Strip Projectors |
| Author | "Kinemette" |
| Notes | Petzval portrait or projection objective in rack focusing mount, condenser, objectives, adapting photographic lenses, other available lenses, throw distance, various lenses, supplementary lenses, available material |