Canon Patent For Super Fast Auto-Focus Using 2 Motors (new STM technology)
Egami (translated) spotted a patent filed by Canon for a new, faster auto-focus that appears to be the next step in STM lens technology. The AF in the patent is driven by 2 motors, the main STM and an auxiliary DCM motor. This should be useful especially for continuous shooting & focusing in the videographers domain.
Machine translated text:
- Patent Publication No. 2014-164106
- Published Date 2014.9.8
- Filing date 2013.2.25
- Example 1
- Moving the aperture one two motors
- Main motor STM
- Auxiliary motor DCM
- And then rotate the first auxiliary motor, to assist the acceleration of the main motor