Metabones Speed Booster for Micro Four Thirds - Review In: Cameras Posted August 28, 2013 Does anyone know specifically what the crop factor would be for Speed Booster + Nikkor DX lenses on a BMCC? The horizontal dimension of DX and BMCC frames is 23.6mm and 15.81mm, respectively. So the horizontal crop factor would be: (23.6)(.71)/15.81 = 1.06 If you calculate it based on the diagonals (28.4mm and 18.133mm, respectively for DX and BMCC) you get: (28.4)(0.71)/18.133 = 1.11 Either way, you wind up cropping just a small portion of the DX format image circle. On the other hand, if you mean crop factor relative to full-frame (24mm x 36mm) format based on the horizontal you would get: (36/15.81)(0.71) = 1.62
Metabones Speed Booster for Micro Four Thirds - Review
In: Cameras
Posted
The horizontal dimension of DX and BMCC frames is 23.6mm and 15.81mm, respectively. So the horizontal crop factor would be:
(23.6)(.71)/15.81 = 1.06
If you calculate it based on the diagonals (28.4mm and 18.133mm, respectively for DX and BMCC) you get:
(28.4)(0.71)/18.133 = 1.11
Either way, you wind up cropping just a small portion of the DX format image circle.
On the other hand, if you mean crop factor relative to full-frame (24mm x 36mm) format based on the horizontal you would get:
(36/15.81)(0.71) = 1.62