Larry, I have the 24mm f/1.8 (the 20mm, 24mm and 28mm all share the same body) and your description is correct for a non-faulty lens. It would be nice if setting the lens to manual focus disengaged the drive gear, but Sigma didn't think that was a good idea...probably just to annoy you and me :-)
In related matters: How do you find this lens wide open? My 24mm is not great at f/1.8, improves noticeably by f/2, and is pretty good at f/2.2. Oh, and have you noticed that wide open the camera body reads f/1.7, not f/1.8? Cheers, --M. -- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- http://www.EnticingTheLight.com -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- 2009/12/10 Larry Colen <[email protected]>: > Does anyone else have the 20/1.8? > > Optically it seems like a sweet piece of glass. Unfortunately while I needed > it last weekend, it didn't show up until Monday and I haven't had a lot of > time to play with it. > > The first thing that I noticed was that in manual focus, focusing it felt > like it was turning a motor. > > It also turns out that if the lens is in manual focus, and the camera is in > auto focus, autofocus still works, it's just that the focus ring won't turn > when the camera focuses. > > Looking on the mount, when I manually focus, the drive gear for the > autofocus will turn. > > The big problem is that this makes the lens unpleasant to manually focus, > though it works fine, it feels bad. Is this the way it's supposed to work? > Or do I have a bad copy of the lens? > > -- > Larry Colen [email protected] sent from i4est > > > > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
