Definitely my favorite lens. Very versatile and sharp. My only concern is that this lens isn't weatherproof, which is a significant limitation for a true general-purpose lens. In all other respects it outperforms both version 1 and 2 of the Canon 24-105mm, including T-stop values (let more light through). IS is as good as advertised. I only give it 4 stars because of the weather protection.
Can you provide more context about the word "Discontinued"?
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