The Zeiss Milvus 135mm F2 has the longest focal length of any lens in the 11-strong Milvus family. It comes into its own for tight head shots and medium-distance portraiture, and also works well for still life, where you have the time to focus accurately with this manual-focus lens. The combination of focal length and f/2 aperture enables a really tight depth of field, so accurate focusing is often paramount. That can be tricky to achieve, especially if your subject is anything other than absolutely still. As well see, however, help is at hand.
