You asked
Is the sony fe 24 105mm f 4 g oss good for portraits?
The Sony FE 24-105mm f/4 G OSS is a good all-round lens that can do portraits, but it isn't a dedicated portrait lens. On full frame, its 105mm end is in the flattering range, since standing further back keeps faces in proportion. It's also stabilised, which helps when you're shooting handheld indoors.
The catch is the f/4 aperture. You'll get less background blur than with the f/1.8 primes I recommend on the portraits page. For environmental portraits, where you want to show the setting, it works well. For soft, creamy backgrounds, I'd add an 85mm f/1.8 or 50mm f/1.8 alongside it, or choose a faster lens instead.
Written by Claude from this site's pages.