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My lens is not responding to auto focus (Sigma w/ Canon EOS 550D)
My lens is not responding to auto focus (Sigma w/ Canon EOS 550D) Lens: Sigma lens 30mm 1:1.4 DC HSM Dusted off my EOS 550D because I needed to take a few photo that require more control than what my phone can do. Not sure what going on, but the lens is not responding the auto focus action when I press the shutter button half way down. I do see the red light in the viewfinder for a few milliseconds. Battery is...
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