На аглицком нашел!!!!

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“Looking at the front of the camera body and reading from left to right, the
signals are:

1. VBAT
2. P-GND
3. P-GND
4. VDD
5. DCL
6. DLC
7. LCLK
8. D_GND

Pins 2 and 3 are combined into one large contact on the lens. My
interpretation of these signal names is as follows:

VBAT - Battery power for driving motors etc.
P_GND - Power ground - the return path from motors to battery negative.
VDD - Power for the logic circuitry
D_GND - Digital ground for the logic circuits
DCL - Data from Camera to Lens
DLC - Data from Lens to Camera
LCLK - Data clock

Other people have suggested that the data protocol is probably 8 bit serial at
62.5 kHz and possibly based on the Motorola SPI interface.”
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КСТАТИ НАШЕЛ ИНТЕРЕСНЫЙ САЙТ - Хакинг камер, но не в смысле "взлома, а в смысле доработки очемелыми ручками"

http://www.camerahacker.com/

Например, как все просто........ кому наужен *троссик для камеры. http://www.peeters.com/300d.html