Voigtländer's Nokton VM 50mm f/1.0 and f/1.5 lenses offer compelling alternatives to Leica’s premium optics, balancing affordability, performance, and build quality for M-Mount users seeking versatile, fast lenses.
Lumix and Sigma L-Mount prime lenses offer superb optical performance in a cost-effective package. You can't really go wrong, whichever model you choose.
What is more important for a zoom lens: range or aperture? Read a few answers to these old questions - and a suggestion that opens even more options...