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remotely controlling focus and iris on an SLR lens

Hi Chieh,

I've got you book sitting in my lab and the chapter on page 253 you discuss the control signals that a canon eos produces to operate the lens.

I've got an application where I'm using a machine vision camera (DVC-2000)which will be in a pressure housing and used to image small animals in the ocean. I'd like to use a nice tamron lens I have which is built for a Nikon F-mount. When I have the lens connected to my Nikon D1X digital camera, the D1X controls the autofocus and iris controls in the lens. Rather than shell out tens of thousands of dollars for a power focus power iris zoom lens with optics suitable for a 1" CCD, I have been thinking of a way to gain control over the internal motors in the lens that focus and set the iris. Potentially I could then use RS232 or some other protocol to send the appropriate voltages to the right pins on the lens in the same way that the D1X does when the lens is mated to its electrical contacts.

A search of the web has thus far failed to turn up any identification for the pins on the D1X that mate with the lens. Have you ever tried to remotely actuate an autofocus lens? Any idea of what the protocols are to control the lens?

Any help you can provide would be much appreciated.

thanks

Mark Benfield
Tue, 12 Feb 2008 18:36:26 +0000

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