I've start a new thread to seek advices, suggestions and opinions on the lens that I'm intending to get.
Canon EF-S 15-85mm (f/3.5-5.6)
This lens is wide, and far focal length enough for a Landscape and a Walkabout shoot, but to me, it's quite costly, around $1k ++.
Tamron 17-50 (f/2.8 Constant)
Yes, this price is pretty affordable for me, $600ish. Pretty wide for Landscape and a Walkabout, but I'm afraid about the focal length that it's pretty short for far subject.
Sigma 17-70 (f/2.8-4.5) Macro
This seems good, cost around $580ish. Wide is okay for me, Walkabout is quite a far focal length for me, and a additional feature of macro. But I'm afraid cos this lens isn't popular, and I wonder what's the pros and cons about this lens.
Hope to seek good opinions on this lenses.