I'm going on business trip to Japan 12/7 - 12/12 and was looking at a good "vacation lens" for non-working time. I've read articles here: http://www.luminous-landscape.com/reviews/lenses/24vs28.shtml http://www.luminous-landscape.com/reviews/lenses/28-105.shtml B&H has the Canon EF 24-105mm f/4L IS USM, factory refurb, $150 less than new. Has anyone here bought Canon "factory refurb"? What are your pros/cons? It's got 58mm filter, so I'd be able to use the filters I just bought for my kit lens with it (They are decent Hoya's). I got this email response to lens condition, kinda generic. The other lens I'm looking at is a 50mm 1.8 ($100) for the low light stuff, from what I've read it's 99% of the 1.4 ($375), so saving $275 is good for me.