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Like other M lenses, the Summaron is manual focus only. The svelte design doesn't leave room for a focus tab, like you get on most other Leica lenses. Instead there's a small focus knob that turns ...

Zooming is external, so the front does extend, but never beyond the edge of the lens hood, so to all intents and purposes the lens always maintains its maximum length of 9.2cms, whatever focal length ...