You asked
Is the samyang af 24 70mm f 2 8 fe worth it?
Yes, if you shoot Sony E and want one standard zoom that handles most everyday work. It's a full frame lens covering 24-70mm at a constant f/2.8, so the exposure stays the same as you zoom. That helps at events and in low light. It has autofocus but no stabilisation, so you'll lean on faster shutter speeds or a stabilised body.
It fits a long list of Sony full frame bodies, from the a7 up to the a1 II. On APS-C it frames like 36-105mm.
If you mostly shoot travel or street, or you're on a tighter budget, a good APS-C camera with a simpler standard zoom may suit you better. Read Sensor sizes before you decide, and see Lenses for where a standard zoom fits in a first kit.
Written by Claude from this site's pages.