I have to admit that it is a little hard to put oneself in your shoes because your objectives seem at odds with each other. You started off saying you wanted wide (for landscapes) and then say that f3.5 is too slow for you. Few landscapes are shot wide open, and most wide lenses are going to be slower than f3.5 unless you are spending an ungodly amount of money.
All of your cameras are APS-C so 28 isn't really wide at all. 24 only equiv. to the old 35mm "wide". It is surprising you don't have a kit lens in your stable, if only for the 18mm end. I think the lens you really want and would be in love with once you had it, is the Sigma EX 10-20mm (15-30mm equiv. FOV on APS-C) You can find them used for around $350 (that's what I got mine for a couple of years ago) to $400, for the f4.-5.6 version. Feast your eyes on what it can do: http://www.pentaxforums.com/forums/lens-clubs/84539-sigma-10-20mm-club.html -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
