I don't recommend using it with 18MP and above. This is indeed a very soft lens. Also on 2.8. It's REALLY plastic and you can see the stitching where the glass meets the plastic, but it has a metal mount. AF is excruciatingly slow, sometimes taking up to 3-4 seconds to focus, and it's not as sharp as the Canon 50mm f/1.8 (no matter who you're talking to, this lens is at least twice as f/1.8 soft). But hey, if you're not a pro and want a cheap prime lens to start with, it doesn't get much better.
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