You asked

Is the om system m zuiko 14 42mm f 3 5 5 6 iii worth it?

Here is what the site says about that.

From OM System M.Zuiko 14-42mm f/3.5-5.6 III: OM System M.Zuiko 14-42mm f/3.5-5.6 III: A zoom lens by OM System for Micro Four Thirds cameras, 14-42mm f/3.5-5.6. The splash-proof update of the 14-42mm II R kit lens: the same element layout, and it focuses much closer. Specs - Maker: OM System - Focal length: 14-42mm (zoom) - Maximum aperture: f/3.5-5.6 (it gets darker as you zoom in) - Made for: Micro Four Thirds sensors - Mounts: Micro Four Thirds - Stabilised: no - Autofocus: ...

From Sensor sizes: Is full frame worth it?: For low light, events, and portraits with very shallow depth of field, yes. For travel, street, wildlife on a budget, and most hobby photography, a good APS-C camera with good lenses is enough, and you'll carry it more. Lenses and light matter more than the last stop of sensor performance.

Quoted from this site's pages.

From these pages