The Zeiss C Biogon T* f/4.5 21mm, to give it its full title.

I've mentioned this lens a few times, it was one of the first I bought for my M8 and still one of my favourites. Light, compact, very fine build (better than most of my Leicas, some of which seem to have minuscule play in the aperture ring), and gives very pleasing images.

A slow lens of course, but ideal for exteriors and travel especially in warmer climes, where I usually find myself shooting at medium apertures.

The C apparently means both Classic and Compact, and the lens certainly seems to give a saturated nostalgic, occasionally almost stylised, feel.

A few images: