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 December 21, 2005 - 08.15 GMT
Sigma has issued a service notice for the use of their HSM lenses on the new Nikon D200 digital SLR. HSM or HyperSonic Motor lenses use a motor driven by ultrasonic waves to provide a quiet, high-speed autofocus (AF). Due to a firmware bug in these lenses, this function does not operate when the AF operation button on the back of the body of Nikon D200 digital SLR is used. In case the shutter button is used for AF operation, the camera and lens combination works without any problem. Sigma is committed to correct this situation and will start updating firmware of these lenses free of charge today...More
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