I've been asked to post my opinion about my newly acquired HD 16-85mm. So here it is. You can click images to get to larger versions.
I am comparing the lens mainly to the DA 18-55 WR and the Sigma 17-70 f2.8-f4.5 (version 1). The 16-85 will replace the kit lens as my WR lens, and might replace the Sigma for many walkaround occasions. If it lives up to my expectations, that is.
The lens is larger than I thought. Mainly longer. It's surprisingly larger than the Sigma. However, it has the same weight.
It is, of course, much larger than the kit lens, but I decided to include pictures to give a sense of scale.
The finish matches the K-3 (and other bodies) perfectly. Really beautiful. It balances well also, because of the relative low weight. The zoom ring falls under the hand quite naturally. This is my first lens with the focus ring near the body. It's ok, not better than at the front, but I don't expect to use it a lot.
The zoom ring is smooth, and I am not worried by the lack of a lock : I'm sure it won't move. The focus ring is interesting, in the fact that it has soft stops. This means that when you reach the end of its throw, it keeps moving with more friction. It's nice, though the 60-25, which has the same system, has much more friction, so the transition is easier to see. There are no focus distance marks anywhere.
Quick note : the lens cap is a new design, with less rounded features than the usual.
In use the lens is just great. 16mm makes a visible difference, even when compared to 17mm. It feels like I've stepped into UWA territory for the first time. The 85mm range is also a bonus over what I own. All in all the range feels extremely useful and well chosen (Pentax is not alone in choosing this range of course). Here is an example of the same scene at 16 and 85mm to give a sense of scale.
AF is a wonder. It's even more silent than the SDM motor of the 60-250. It's faster by all accounts. It seems accurate, at least I've had no misses so far. It is also leagues ahead of any screw-drive lens when using live view or video. The Sigma is no slouch but the 16-85 is even more responsive.
I have mainly tested the lens outside, in good light. That's where I expect to use it. And it performs above my expectations there. Colours are saturated and accurate, sharpness is better than excellent, there are no CA and PF to speak of. I see some distortion at 16mm, as expected, but it's not bad at all.
Here are many samples pictures. I invite you to click the images to get to larger versions. In particular, look at the texture on my son's hat. And if you see haze in the outdoors images, it's because the waterfall is throwing mist around
f8
f5.6