thumb|right|Leica Summilux-M 50 mm Version 2 (1961 – 1968) thumb|right|Leica Summilux 35 mm Version 1 thumb|right|Optical Diagram of Leica Summilux-R 50mm f/1.4 II lens. The name Summilux is used by Leica and Panasonic Lumix to designate camera lenses that have a maximum aperture brighter than f/2, typically at f/1.4, but dimmer than f/1.25. The lens has been in production since 1959 and carries on to the present day.
thumb|right|Leica Summilux-M 50 mm Version 2 (1961 – 1968) thumb|right|Leica Summilux 35 mm Version 1 thumb|right|Optical Diagram of Leica Summilux-R 50mm f/1.4 II lens. The name Summilux is used by Leica and Panasonic Lumix to designate camera lenses that have a maximum aperture brighter than f/2, typically at f/1.4, but dimmer than f/1.25. The lens has been in production since 1959 and carries on to the present day.
==History== The name Summilux is a combination of Summum, which is the Latin word for highest, while Lux is for light. The first Summilux was the 50 mm of 1959, followed by a new 50 mm Summilux design in 1961, whose optics remained unchanged until replaced by the 50 mm Summilux-M ASPH of 2004.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).