You asked
Is the pentax hd da 16 85mm f 3 5 5 6 ed dc wr good for vlogging?
Not really. It's a fine general-purpose zoom, but it isn't a good match for vlogging. On APS-C Pentax K bodies it frames like 24-128mm on full frame, and the video guide says a 24mm view crops you tight once stabilisation crops in further. This lens isn't stabilised, so you'd be holding a fairly tight frame at arm's length with no help from the lens.
It also fits the Pentax K-1 and K-1 Mark II, but only in APS-C crop mode there. If you want a vlogging setup, look for a small camera with a flip-out screen and a wide lens, around 16-20mm full-frame equivalent. The Video guide covers what to look for, including a microphone input, which matters more than the lens. You can also check the Pentax HD DA 16-85mm page for the full list of bodies it fits.
Written by Claude from this site's pages.