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Forum: Pentax SLR Lens Discussion
01-31-2018, 08:04 AM
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If you're serious about your photography, the "either - or" idea doesn't work. There are shots where having the f/2.8 is an absolute necessity. Having a walk around zoom with a greater range is also a big advantage. I use a Sigma 17-70C f/2.8-4 as my walk around and my DA50/1.8 when I need/want shallower DOF. I really love the extended range the 17-70 gives me and it's on my camera most of the time. The 16-85 wasn't available when I bought the Sigma but if I was shopping today, it would be high on my list of lenses to consider. For me, if I already owned the 16-50, I would keep it and add the 16-85.
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