On Dec 28, 2008, at 6:59 PM, Adam Maas wrote:
The 10-20 had serious issues when originally released (As many Sigma's do). But they've got the issues under control and you can now reliably get a good copy (As happens to many Sigma designs once Sigma has ironed out their production bugs). It's heavy but not particularly large (Remember this is the equivalent of a 15-30mm lens, everything else of similar range is larger)
I don't know what about it being an equivalent field of view on some other camera would make any difference.
The Sigma 10-20 is about three and a quarter by three and half inches in size and weighs about a pound. The Pentax 12-24 is about the same. The Pentax 14 I chose was a stop faster and a bit shorter, a little bit lighter weight. Not a big difference between the three lenses.
I don't trust Sigma quality control. At all. I've never seen them "iron out their production bugs" ... people are still complaining about bad units on the 30mm f/1.4 on new purchases three years after it was introduced.
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