The 35 f/1.4 Nokton lens gives a small size telephoto lens on M mount cameras. Its fairly sharp wide open (sharper than the kit lens, for example), and is much sharper by f/2.8. It is all metal construction, focuses quite easily and smoothly.
The Voigtlander “M” lenses are quite small, fitting appropriately to the Micro 4/3s cameras with an adapter. Please note, however – to use this lens on a 4/3 mount camera you must have (or rent) a Leica M to Micro 4/3 adapter