You asked

Is the nikon af s 50mm f 1 8g worth it?

Yes, I think it's worth it. The portraits guide calls the 50mm f/1.8 the cheapest great lens in photography, and if you only buy one lens for people, this is the one I'd pick. It's autofocus only, with no stabilisation, and it fits a long list of Nikon F bodies.

On a full-frame body like the Nikon D750 or Nikon D850, it gives a natural, slightly tight view. On an APS-C body such as the Nikon D5600 or Nikon D7500, it frames like about 75mm, which is a classic portrait length. If you're unsure whether full frame is worth the extra cost, the sensor sizes guide explains the trade-off.

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