Lens (in mm) | Image Size on Film (in mm) | Fixed (tripod) | Driven (At Sidereal Rate) |
50 | 0.45 | 12 sec. | 4 min. |
100 | 0.9 | 6 sec. | 2 min. |
200 | 1.8 | 3 sec. | 1 min. |
500 | 4.5 | 1 sec. | 20 sec. |
1000 | 9 | 1/2 sec. | 10 sec. |
1500 | 13.5 | 1/4 sec. | 7 sec. |
2000 | 18 | 1/8 sec. | 5 sec. |
2500 | 23 | 1/15 sec. | 3 sec. |
ISO Film Speed | Full Moon | Gibbous | First Quarter | Thick Cresent | Thin Cresent | Earthshine |
25 | 1/15 | 1/8 | 1/4 | 1/2 | 1 | |
50 | 1/30 | 1/15 | 1/18 | 1/4 | 1/2 | |
100 | 1/60 | 1/30 | 1/15 | 1/8 | 1/4 | |
200 | 1/125 | 1/60 | 1/30 | 1/15 | 1/8 | 40 to 80 sec. |
400 | 1/250 | 1/125 | 1/60 | 1/30 | 1/15 | 20 to 40 sec. |
800 | 1/500 | 1/250 | 1/125 | 1/60 | 1/30 | 10 to 20 sec. |
1600 | 1/1000 | 1/500 | 1/250 | 1/125 | 1/60 | 5 to 10 sec. |
3200 | 1/2000 | 1/1000 | 1/300 | 1/250 | 1/125 | 2 to 5 sec. |