You asked

Is the voigtl nder heliar classic 50mm f 1 5 worth it?

Here is what the site says about that.

From Voigtländer Heliar Classic 50mm f/1.5: Voigtländer Heliar Classic 50mm f/1.5: A prime lens by Voigtländer for Full frame cameras, 50mm f/1.5. Specs - Maker: Voigtländer - Focal length: 50mm (prime) - Maximum aperture: f/1.5 - Made for: Full frame sensors - Mounts: Leica M - Stabilised: no - Autofocus: no, manual focus What it frames like - On full frame (Leica M): as marked, 50mm. Cameras it fits - Leica M9: Full frame - Leica M9-P: Full frame - [Leica ...

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