You asked
Is the sony fe 70 200mm f 2 8 gm oss ii good on aps c?
Yes, it works well on APS-C. On a Sony APS-C body it frames like 105-300mm on full frame, and f/2.8 gives about the depth of field of f/4.2. That makes it a strong pick for sport and wildlife, where extra reach matters most. The wildlife and sport guide explains why smaller sensors help here.
It's a full-frame lens, so you're paying for a bigger lens than an APS-C body strictly needs. If reach is the goal, it's a good match. For portraits, the portrait lens guide suggests a 70-200mm for tight headshots with room between you and your subject.
Good APS-C partners from the catalogue include the Sony a6700 and the Sony a6600. Both are sensible choices if you want a capable body to hang this lens on.
Written by Claude from this site's pages.