Thomas,

No problem reading which is your native language, by the way?

I very much doubt that GPhoto could produce exposures for more than 30 secs over USB - as I understand it, this is a matter of the design of the camera, not the driver.

If you have one that works - could you not try attaching a serie-to-USB-adapter to that and connect to the computer? My old cable is has the small connetor to the camera on one end (like an earphone-plug) and a serial D-Sub in the other end. The serial D-sub was then connected to a starad RS232-USB-adaptor like this:
www.dustin.se/product/5011025600/usb-to-...Y366kbMaAkpcEALw_wcB

Which has a USB connector in the other end. And that one to the computer.

I think you can still buy the whole serial release cable online, but I cannot recall from who I bought mine - someone in UK.

Magnus

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