I have an E-3 with the Zuiko 12-60mm SWD lens. I do quite a bit of
landscape/ nature/architecture/travel (just returned from China),
and what I would call workplace/people photography (not necessarily
portraits but close). I would like some advice on the next lens to
add. The main priority is that it be "fast" - F2.8 or less. Any
advice?
Landscape - Nature - Architecture - Travel - Workplace/People is quite a wide range of needs. It's no surprise there is little agreement on what would be the one lens to add to the already capable 12-60.
You may want to think about this more from a system point of view, then decide what your next step will be. For this range of apps, you'll probably want
-- a shallow DOF portrait-style lens for the workplace/people need. The 25/1.4 could be good, 14-35 the bomb.
-- Landscape/Travel/Nature -- the 12-60 is already pretty darn useful. The simplest addition would be the 50-200 SWD. This is a terrific lens, esp. with the E-3 IS. If you want to spend more, the 35-100 and 150 are superb. The 50-200 is far more luggable. As others have already said, the 12-60 + 50-200 is a nice two-lens kit. (I have the older 50-200, and the 150, and these are workhorses).
-- Architectural -- For interiors, its hard to beat the 7-14. I have this one too, and its a work-horse. As nice as the 11-22 is, its hard to justify given the overlap with the 12-60.
So there you have it, a rationale for any one of three different lenses. In gross generalization --> the 7-14 for interior architecture, the 14-35 (or fixed lens alternative) for workplace/people, and the 50-200 for travel/nature.
Your move.
Jeff