I am still testing and enjoying using the new Pentax 17-70 F4 SDM lens that I have had for the last week. I have done a comparison with the Pentax 16 to 45 and a Sigma 17 to 70. We are still working on our new site to display them. This is a photo of the river this morning and a wasp outside of our store. I was exploring the lens "Bokeh" when the wasp showed up. Bill