Originally posted by amalongi I like the flexibility of the 16-45 although even it is verging on slightly bulky for my tastes. I have gravitated towards the FA 28-105/3.2-4.5 but am not sure.
I'll chime in as the lone supporter of your idea for an FA 28-105/3.2-4.5. For some time, I've used for walkaround and travel zooms an FA 20-35/4 and FA 28-105/3.2-4.5. Over time, I've found the FA 20-35 not quite wide enough, so I've just recently swapped it out for the DA 16-45. But I'm sticking with my FA 28-105/3.2/4.5 for now.
If compact size and light weight are a priority for you, and zooms suit your general shooting style, then I think the FA 28-105/3.2-4.5 is a great option. I find the IQ Good Enough*, the size and weight fantastic, and I really enjoy the color rendering of this lens.
* Sharpness wide open isn't outstanding, but most of my shots are stopped down at least a bit. And besides, by far the biggest challenge I face taking good photos has nothing to do with relative sharpness of the lens, but rather my mind's (creative) eye -- or lack thereof.
I believe all the lenses mentioned in this thread have their weights listed in the Lens Review DB. Note the FA 28-105/3.2-4.5 weight of 255g is without the hood. Add another 25g for the hood.
I used to have a Sigma 17-70/2.8-4.0 which I found an excellent walkaround, have considered the DA 17-70, but ultimately determined the 70mm wasn't long enough, hence my use of a two-zoom combo.
I'll admit, the new DA 18-135 is certainly tempting, and that's the next decision I'll have to make for my walkaround needs.
Oh, if it matters, the FA 28-105/3.2-4.5 focal length / max aperture map as follows:
28-33mm - 3.2
34-42mm - 3.5
43-84mm - 4.0
85-105mm - 4.5
FWIW, my takeaway from the whole discussion: I'm glad we have so many good options!