You can find a review of the above in the reviews section:
http://www.birdforum.net/reviews/showproduct.php/product/403/limit/recent
With a wide field of view, decent sweet spot, superb contrast and brightness, low chromatic aberration and decent mechanics, there is a lot to like. Weak spots include strong field curvature and obvious edge softness. Not everyone likes them, and as usual, try them for yourself rather than take someone else's view as gospel.
http://www.birdforum.net/reviews/showproduct.php/product/403/limit/recent
With a wide field of view, decent sweet spot, superb contrast and brightness, low chromatic aberration and decent mechanics, there is a lot to like. Weak spots include strong field curvature and obvious edge softness. Not everyone likes them, and as usual, try them for yourself rather than take someone else's view as gospel.