70. sigma - live display problem lens

Hi guys,.

Don't know if anyone has experienced the problem I have at the moment, but I would be interested to receive feedback.

Camera is 70 d and the lens is a Sigma 17-70 f2.8 to 4.5. If I use live view and touch the screen to focus the lens focuses fine and looks sharp on the screen. Can I enlarge the area of focus for more precision and all looks ok. However, when I press the button at halfway to win the lens memory moves back and forth as memorization of the normal search. Then the camera will beep and the place turns green lock confirmation.

This is that the image is actually at the point when the squre turns green. If I release the button of the system auto focus continuous finds new clear focus, but when I press the button again to half way down it crashes again out of focus.

Incidentally the lens works very well in AF mode in the viewfinder

Anyone got any ideas?

concerning

yogi62

It is not worth.  Forget about it, and use it as what or buy a lens that is compatible with your device.

Tags: Canon Camera

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