You asked

Voigtl nder color skopar 21mm f 4 p vs voigtl nder color skopar vintage line 21mm f 3 5 aspherical?

Both are 21mm manual-focus primes for Leica M bodies, and the main difference is the maximum aperture. The Voigtländer Color-Skopar Vintage Line 21mm f/3.5 Aspherical is the brighter of the two, so it's the one I'd pick for dim interiors, street scenes at dusk, or anywhere you want a little more light to work with. The Voigtländer Color-Skopar 21mm f/4 P gives up a third of a stop, which is a small trade, and it fits the same bodies.

Both are full frame lenses, so they frame the same 21mm on any Leica M body listed on their pages, from the M9 through to the M11 family. Neither has stabilisation or autofocus, so you'll be focusing by hand either way. If you shoot mostly in good light, the choice comes down to what you're happy to pay for; if light is often poor, go with the f/3.5.

Written by Claude from this site's pages.

From these pages