Originally posted by lotech I am looking for replacement for my well used and worn 16-50mm/f2.8, since I decided to skip FF so there are 2 lenses in my mind, the 16-85mm/f3.5-5.6 and the older 17-70mm/f4, I am more inclined to the latter for some reasons. The 17-70mm is cheaper, little brighter with fixed aperture, the range is just right for me, and new old stock still available, I don’t see too much info about the 16-85mm not even Youtube review I wonder why.
I would go with the 16-85mm because I prefer both the wider angle at 16mm and the longer end at 85mm. Yes, the 17-70mm has its merits, but when I use a zoom, I often find myself at the extremes and in this case one lens can do what the other can't.
When I use a zoom, convenience is often the priority. Otherwise, I'd be using my primes for speed or IQ.
With that said, if you don't need 16mm or 70-85mm, the Sigma 17-70mm is the better choice.
Full disclosure: What is my everyday lens? An Apple 4.15mm f/2.2.