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Old Apr 8, 2006, 6:18 PM   #1
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My new sigma 100-300 f4 hsm lens will not auto focus on my D70. I have no problems with my other lenses. I have set the camera to auto mode and locked the lens in f22. My camera gives me a f-- signal which tells me no comunication between lens and camera. I've cleaned the contacts and still no communication. I sent for a new lens after talking to a sigma servicerep and the lens still does not work. Has any one had the same problem? The lens works great in manual mode but should work in auto mode as well.
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