50mm is my favourite focal length as it best represents human eye perspective for street photography. The Leica 50mm F1.4 Summilux ASPH Lens is my favourite out of them all and I have tried similar fast 50mm lenses offered in Leica M mount, which includes the Zeiss 50mm F1.5 Sonnar ZM and Voigtlander Nokton 50mm F1.5 Aspherical VM Lens.

The Voigtlander Nokton 50mm F1.5 Aspherical has a classic barrel design with all metal construction finished in either black aluminium or chrome brass. The lens is inspired by the original LTM version made in the 1950s and specifically manufactured the modern version with classic looks. It uses the same basic lens design as the classic version with modern performance by incorporating an aspherical element into the optical design to reduce aberration and distortion with improved sharpness. When shooting the lens wide open at its maximum aperture allows it to generate shallow depth of field with pleasant smooth bokeh. It is the best combination of modern and classic world.