Title: Fast and Clear
Review: I bought this lens for low light photography well the plus is it allows more light in than my EF70-50mm F.8 IS lens or my Sigma EX 18-50mm F.8 but it hunts in dark spaces in AF that is the minus. It will lock but by then it is usually to late. When shooting near wide open if you can't focus fast and accurately in concert photography you are sunk. I often use MF instead of AF. I can't use flash so I am forced many times to use MF. It is however very well built not L series well built but compared to the F.8 version it is a tank. It is also crystal clear too. So for me it is a trade off. The hunting in the lowest light is why it does not get the Th star.
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