Unlike many camera lens lines, Leica’s lenses are group into categories under well known trademarked names. Mention the word Noctilux, and a Leica shooter will immediately know that you’re referring to a f/1 lens that’s geared towards shooting in low-light environments.

Photographer Thorsten Overgaard has been working on a definitions page that explains the origins of the various terms — the explanations go beyond what the terms refer to, and include why they were given those names.
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