Summilux

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/1.0. 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.

Description
The Summilux lenses have a maximum f-number of f/1.4, f/1.5 or occasionally f/1.7. This one to 1.5 stops lower than Leica's Noctilux lenses, but the Summilux lenses are smaller as a result. Summilux lenses are designed for low-light photography.

Market position
The Summilux lenses are less expensive than the Noctilux lenses, which has a smaller f-number. However they are bigger, heavier and more expensive than the Summicron.

List of Summilux lenses

 * For the Leica M mount:
 * Summilux-M 21 mm ASPH.
 * Summilux-M 24 mm ASPH.
 * Summilux-M 28 mm ASPH.
 * Summilux 35 mm
 * Summilux-M 35 mm ASPH. FLE Version V
 * Summilux-M 35 mm ASPH. FLE "Short Focus" Version VI
 * Summilux 50 mm
 * Summilux-M 50 mm ASPH.
 * Summilux-M 75 mm
 * Summilux-M 90 mm ASPH.


 * For the Leica R mount:
 * Summilux-R 35 mm
 * Summilux-R 50 mm 1st version
 * Summilux-R 50 mm 2nd version
 * Summilux-R 50 mm 3rd version – 1997 (ROM contacts)
 * Summilux-R 80mm


 * For the Leica L Mount:
 * Summilux-TL 35 mm ASPH.
 * Summilux-SL 50 mm ASPH.


 * For the Four Thirds mount :


 * For the Micro Four Thirds mount :


 * Panasonic Leica DG Vario-Summilux 10-25 mm ASPH.
 * Panasonic Leica DG Summilux 12 mm ASPH.
 * Panasonic Leica DG Summilux 15 mm ASPH.
 * Panasonic Leica DG Summilux 25 mm
 * Panasonic Leica DG Summilux 25 mm II ASPH.