Originally posted by ALLCAPS Happy 6 year k5iis user here. One of the things that drew me to the brand was the in body stabilization. I have "nervous hands," and my recent freehand use of longer focal lengths has been a challenge.
For those of you who have used the older cameras as well as the latest generations of Pentax gear, have you noticed improvements in the effectiveness of the IBIS systems? A more effective IBIS system and better AF in the k-new would almost clinch a purchase from me.
I have had K100D, K200D, K-5, K-3, and KP (also K-1ii, which has similar IBIS to KP). The IBIS has continuously, and quite noticeably, improved through this series. When I got the KP, and using it with lenses up to 300mm (the DA 55-300 PLM is a favorite), I just got the feeling that I could throw away my tripod (I actually didn't, but the additional freedom from the tripod for lower shutter speeds was wonderful).
In addition to better IBIS, the KP also maintains better noise characteristics to higher ISO values, which permits higher shutter speeds, also reducing the effect of shake.
Pentax IBIS technology has steadily, and significantly improved over camera generations. My personal expectation is that K-new IBIS will be at least better than KP/K-1 level, which far better than K-5 capability. And it will have better higher ISO noise characteristics than the K-5iis, so your shake experience should be noticeably better than what you have currently. But it won't be cheap.