Sigma 30mm f/1.4 EX DC Pentax-k

"I have had lots of good experiences with this lens. Versitile lens that does well in most lighting conditions."

"Awesome lens. In good to decent light, sharp and snappy AF. A 30mm f/1.4 on an crop center hits a pretty decent sweet spot. Relatively sharp (although not across the frame.) Decent MF feel, especially for a modern third party AF lens."

"The only thing I don't like about it is that it doesn't coordinate with my Pentax 540 GZ Flash...In low light, it remains difficult to focus by any means, MF or AF. Occasionally misses focus completely, even with focus confirmation by the camera. The focus problems may also stem from the K200d's poor autofocus system. meaning I have to set the exposure manually which is kind of a drag."