APPENDIX A
CHARTS AND FORMULAS
Miniatures
(From Photography of Miniature Effects—High-Speed Photography in Chapter 3.)
Formula to determine proper frame rate for scale being used:
(√m) x (r) = f
where
| m | = | miniature’s scale |
| r | = | base frame rate |
| f | = | new frame rate. |
Example: 1:4 scale at 24 fps = (√4) × (24) = (2) × (24) = 48 fps
Formula to determine proper actual speed of a scaled object at a scaled frame rate:
(rs/m) = (b)
(b) x (r) = (as)
where
| rs | = | real object speed |
| m | = | miniature’s scale |
| b | = | base speed |
| r | = | frame rate factor |
| as | = | actual speed for filming. |
| Examples: | 36 mph × 1:6 scale car = 8.8 feet per second |
| 8.8 feet per second × 2.5 normal frame rate = 22 feet per second |
Camera and Lens Chart ...
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