You asked
Tamron 70 180mm f 2 8 di iii vc vxd g2 vs samyang af 60 180mm f 2 8?
Both are full-frame f/2.8 zooms with autofocus, so the choice comes down to a few differences. The Tamron 70-180mm f/2.8 Di III VC VXD G2 is stabilised, which helps when you shoot handheld or in dim light. It also covers Nikon Z as well as Sony E.
The Samyang AF 60-180mm f/2.8 has no stabilisation, but it weighs about 730 grams and starts a little wider at 60mm. That extra width helps indoors and with groups. It mounts on Sony E and L-Mount.
If you shoot Sony E, my pick is the Tamron for everyday handheld work. If you're on L-Mount, the Samyang is your option here, and if you're on Nikon Z, the Tamron is the only one of the two that fits. For more on choosing telephoto zooms for people, see Portraits.
Written by Claude from this site's pages.