I've had a Sigma 18/3.5 for about a year. I'm happy with it, though I assume a Pentax equivalent would be better.
It replaced my old Kiron-made, screwmount Vivitar 20/3.5. In my non-scientific tests, sharpness was about the same between those two lenses, given the same aperture. A little soft wide open, but fine at f5.6 or smaller. Of course, the Sigma's FOV is a bit wider. With similar sharpness, I was happy to have the Sigma's modern conveniences (it's an 'A'), wider FOV, and tulip hood. I only use the Sigma 18/3.5 for film. On my *ist D, I believe my DA 16-45 is better at 18, though I haven't tested that. Mine was US$100 new-in-box on eBay, and I've seen a used one sell there for a little less. I wasn't able to find any tests, reviews, recommendations, or any other information on it before buying. I'm glad I took a chance on it. Greg > Date: Mon, 17 Jan 2005 15:42:36 +0000 > From: [EMAIL PROTECTED] > To: [email protected] > Subject: Sigma 18/3.5 - anyone familiar with this lens? > > Hi! > > I am enabled myself with Sigma 18/3.5 which is to arrive soon. I wanted to > know > what fellow list members have to say about it. I realize it is not Pentax > 18/3.5 but still, I want to ask my question :). > > Thanks. > > Boris
