They are expensive. I keep thinking I'd really like the 12-35/2.8 for travel when changing lenses doesn't work well for variety of reasons. My 24-70L was my workhorse lens for years for travel, though exceedingly big and heavy on a FF and carried with at least 2 fast primes.. I'd like the same for m4/3 but prefer primes still. I have the 20 and the 45/2.8 and carry the original 14-45 (as well as the ZD 9-18), so I may end up adding another prime and bypassing the zoom. All depends upon price, quality of lens---and if I want to invest that much in yet another lens for m4/3 with so much happening camera wise.
Diane
Diane B
http://www.pbase.com/picnic
http://www.flickr.com/photos/38647240@N00/
Diane
--Fast zooms are expensive. When Oly put out their 45 f1.8 and it was SRP'd at $399, OMG the moaning and gnashing of teeth. Personally, I thought it was a bargain.
A good fast zoom will run about $1,000. I can image the complaining over that. For less than $1000 I have a 45 f1.8, 20 f1.7, 14 f2.5, so I'm happy.
SF Photo Gal aka Queer Chick
Canon 1DsIII & 5DII/Panasonic GH1-GF1-LX3
Diane B
http://www.pbase.com/picnic
http://www.flickr.com/photos/38647240@N00/