You asked
Is the leica vario elmar tl 18 56mm f 3 5 5 6 asph worth it?
The Leica Vario-Elmar-TL 18-56mm is a sensible everyday kit zoom for APS-C Leica bodies. It covers roughly 28-85mm equivalent, so it handles everything from wide street shots to tight portraits. It's not stabilised, and the aperture drops from f/3.5 to f/5.6 as you zoom, so it's best in decent light.
If you shoot APS-C, it makes the most sense on a native body like the Leica TL2, the Leica CL, or the Leica TL. It also fits full-frame L-Mount bodies such as the Leica SL3, but only in APS-C crop mode, so you give up resolution.
I'd say it's worth it if you want a light, affordable zoom for travel and general use. For a wider view, look at the Leica Super-Vario-Elmar-TL 11-23mm. For more on what really matters, see Sensor sizes.
Written by Claude from this site's pages.