You asked
Is the tamron 17 70mm f 2 8 di iii a vc rxd good for video?
Yes, it's a sensible video lens, with one catch. It has optical stabilisation and autofocus, and its constant f/2.8 aperture keeps exposure steady as you zoom, which matters when you change framing mid-shot. Cheaper zooms get darker as you zoom in, and that shows up in footage.
The catch is the wide end. On APS-C bodies, 17mm frames like about 26mm on full frame. The video guide suggests a wider view for vlogging at arm's length, so this lens works better for tripod, interview, or standing-back shots than for selfie-style vlogs.
For a camera to pair with it, the Sony ZV-E10 II and Sony a6700 are both APS-C bodies it fits. Check the lens page for the full list of mounts.
Written by Claude from this site's pages.