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Minolta Dynax 7D I fined it dificult to auto focus using a 100mm macro lens even with a very sharp subject the lens just keeps running in & out I never had a problem with this & wonder is this a fault in the camera if so can you tell me a repair centre Thanks

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I don't know if I can help you. But I will try a guess. Some cameras focus on 1 point and it is not necessary the center. Maybe if you give your camera a point to focus on then keeping your fingers half cocked on the shutter shift the focus off-center to however you want to compose it, then click.
But if it was working properly before and then stopped working properly, did you lend your camera to someone, drop it or subject it to impact? I don't think anything is really wrong but I could be wrong. Have you checked the AF/MF button. Could someone may have accidentally pressed it?
If you are using the macro lens, did you check the camera's distance limits? I understand that the 7D actually focuses faster than the Canon EOS and Pentax. Canon and Pentax need to hunt that's why they take longer.

Posted on Jul 24, 2008

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It seems that you have either a faulty lens or one which is performing outside of the minimum quality standards. You have clearly done everything possible to try and eliminate all other causes. Looking at the firmware updates for your camera, none of them mention an issue involving your lens but you may wish to ensure that you have the latest firmware anyway.

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I will try to help you, but please understand that my experience is with Nikon film cameras. Assuming that the D60 works in a manner similar to a Nikon 35 mm body and that Sigma macro lens work like Nikon macro lens, you should be able to determine the usable subject to lens distance by experimentation. First, make sure the lens is in the macro mode. To do this you must set the auto-focus mode control to the manual focus mode (see your manual). On Nikon lenses, you must first set the focus ring to infinity, then move slider switch, which has two positions marked; "normal" and "macro., to the macro position. You should now be able to rotate the focus ring to the macro range. Use the zoom ring to zoom in and out and focus with the focus ring. The the range over which the lens to subject to lens distance will yield an in focus image will be rather limited and in the range of an inch or so to 6 or 8 inches.

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