Lens Mounts
1 Overview of Lensmounts
http://en.wikipedia.org/wiki/Lens_mount
1.1 Sony E Mount
Seems to be a good choice because there are adapters available for almost every camera type for small money. Even active mounts for Canon EF
Image of the E-Mount on dpreview.com
http://en.wikipedia.org/wiki/Sony_E-mount
Pros
- Flange focal distance 18mm
- Outer diameter 46.1mm
- Frame size APS-C, 35mm
Cons
- not an open standard
- licensing necessary for lens communication protocol
- additional tolerance in the flange focal distance with an adapter
Sony opens E-mount specifications. Seems we are on the safe side with using an E-mount adapter...
1.1.1 E-Mount to EOS Adapter *Inside*
Inside of our E-mount to EOS adapter sample
µC Board to translate from Sony E to Canon EOS
EOS contacts with springs on the PCB side
JL ... position of the EOS mount contact springs
We can replace this board with our own adapter board to connect to the cameras I/O's
1.2 Open standard Mount
P+S Technik offers with their IMS mount an open standard. For AXIOM Beta the adapters are too expensive, but for sure an option for AXIOM Gamma.
Is there a affordable really open standard mount out there?
please add it here...
1.3 Talk with a Canon Lens
Research links for the Canon EF-S Protocol