When stacking one lens on another for macro shots (often a normal or wide angle on a telephoto ), what determines the maximum reproduction ratio that the combination can do?
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M = Fp / Fr
where
- M = magnification
- Fp = Focal length of the prime lens
- Fr = Focal length of the reversed lens
Source: Peter Forsell's great page about Math for macro photographers.
answered Jan 4, 2012 at 19:29
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