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 Bayonet Scans

Full 4800 DPI scans available for download at: http://files.apertus.org/AXIOM-Beta/e-mount-scans.zip

1.1.2 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

Electronic follow focus experiment