I agree with Rand - the X-H1 adds noticeable stability to already stabilized lenses. The 50-140 is a marvel, and the 100-400 is very good (but remember just how long it is - you still need quick shutter speeds because it's got a huge amount of magnification). The 10-24 is well stabilized for a very wide lens. While the 18-55 has merely OK stabilization, I can still shoot it down to 1/20 or so, even at 55mm, on an X-T2. I actually haven't tried the 18-55/X-H1 combination (I have both, but tend to use the unstabilized 16-55 as a standard zoom on the X-H1 - which is more stable than the 18-55 on an unstabilized body).