The EF232 adapter allows the use of Canon EF-mount lenses without requiring the use of a Canon EOS camera body. With the Adapter, focus and iris functions of the lens are precisely controlled over the serial port. The beauty of the Canon EOS lens system is that all of the actuators for the lens are incorporated. But the difficulty is that many of the Canon lenses can not even be manually focused without being attached to a Canon EOS Camera body. That is of course, until now. The EF232 Adapter takes the place of the Camera body, giving functionality such as highly repeatable focus control, and iris control in ½ stop increments.

The electrical and logical interface to the lens is handled by the adapter. Your programmers will talk to the adapter through a set of intuitive two character commands, for the ultimate in ease of use. All that is required to make use of the adapter is a standard RS-232 or USB serial port and a 6V/1A DC power supply. There is no need to understand the complexities of the Canon EF Lens Protocol.

Interfacing to Your Camera

We offer a mechanical adapter to mount the EF232 directly to any standard C-Mount camera.. Mechanical adapters for other camera mounts can be provided as required. The EF232 adapter has a back focal length of 1.1". We can accommodate cameras with back focal lengths much greater than this, such as those employing thermoelectric coolers and/or shutters. Please contact us to discuss your specific needs.

Documentation

Mechanical
(pdf)

Communication
(html)

Electrical
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Installation Guide
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Baud Rate Tutorial
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XModem Tutorial
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Pricing and Availability

The EF232 product line is available directly from Birger Engineering. Standard products ship from stock in small quantities. Larger orders are generally filled within two to four weeks ARO. Payment is by Visa, MasterCard or American Express for initial orders. Credit terms will be extended as appropriate for qualified customers for second orders. Quantity discounts are applied per shipment. Please contact us for larger quantity pricing. Please visit our web store for configuration and pricing information.

Continuing Developments...

We continue to work with a few lead customers, beta testing our newest innovations. We have qualified additional lenses. We have redesigned the interface to allow for field upgrade of the interface protocol, to allow all customers to benefit from our on-going work to add new functionality to the adapter. We are finishing the testing of a version of the adapter that incorporates a Uniblitz CS45 Shutter, drive electronics for the shutter and the EF232 in a single package 4.25" in diameter, with a back focal length of 0.9".

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