I have the Tamron 572DN AF 70-300mm Macro lens and would like to get some more information if you can safely use it with Nikon D3100 DSLR.It looks like it doesn't auto focus and the image appears a little foggy when I take the picture on auto settings. Maybe you have an advice on the settings I should use? I just started my photo adventure and would like to gather some more information about my equipment.
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