make no mistake the Sigma 8-16mm f/4.5-5.6 ASPH is a
BIG lens, especially when compared to the diminutive DA15mm f/4 ED ASPH Limited:
Apart from providing better image quality in the corners the sigma 8-16mm lens isn't anywhere near as versatile as the the DA15 is. In my mind the DA15 lens that offers greater versatility, high flare tolerance, jewel-like construction, small size and the 49mm filter thread should never be overlooked. Also I find that the 8mm setting on my sigma lens doesn't get used all that much, I prefer to stick around the 10-14mm range because the wider a lens gets the harder it is to make a strong composition. There are filters that you can get for the sigma 8-16mm - just be prepared to part with $600, a high quality 49mm circular polariser for the DA15mm f/4 shouldn't set you back more than $70~80 and ND filters are also generally cheaper.
Also I use the Sigma 8-16mm on a K5IIs and it is unbalanced enough as it is - on the K-01 it would be cumbersome to say the least.
Last edited by Digitalis; 03-13-2013 at 03:02 AM.