I do a lot of extremely low light work with the 9-18mm lens but I use long exposures and low ISO. The lens itself won't have any bearing on the performance with high or low ISO, that's the job of the camera.
If you are thinking of normal levels of indoor lighting, the lens does just fine and AF is fairly responsive and reliable. Again, it depends somewhat on the camera rather than just the lens.
Last edited by PeterB666; September 3rd, 2010 at 07:28 PM.
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