The name Summilux is used by Leica and Panasonic Lumix to designate camera lenses that have a maximum aperture of less than f/2, typically f/1.4, but greater 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.^[1] 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. ^[2]

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.^[1] 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.^[1] However they are bigger, heavier and more expensive than the Summicron.

List of Summilux lenses

For the Leica M mount

• Summilux-M 21 mm f/1.4 ASPH.^[3]
• Summilux-M 24 mm f/1.4 ASPH.^[4]
• Summilux-M 28 mm f/1.4 ASPH.^[5]
• Summilux 35 mm f/1.4^[6]
• Summilux-M 35 mm f/1.4 ASPH. FLE Version V^[7]
• Summilux-M 35 mm f/1.4 ASPH. FLE "Short Focus" Version VI^[8]
• Summilux 50 mm f/1.4^[9]
• Summilux-M 50 mm f/1.4 ASPH.^[10]
• Summilux-M 75 mm f/1.4^[11]
• Summilux-M 90 mm f/1.5 ASPH.^[12]

For the Leica R mount

• Summilux-R 35 mm f/1.4^[13]
• Summilux-R 50 mm f/1.4 1st version^[13]
• Summilux-R 50 mm f/1.4 2nd version^[13]
• Summilux-R 50 mm f/1.4 3rd version – 1997 (ROM contacts)^[13]
• Summilux-R 80mm f/1.4^[13]

For the Leica L Mount

• Summilux-TL 35 mm f/1.4 ASPH.^[14]
• Summilux-SL 50 mm f/1.4 ASPH.^[15]

For the Four Thirds mount^{[a 1]}

For the Micro Four Thirds mount^{[a 1]}

• Panasonic Leica DG Vario-Summilux 10-25 mm f/1.7 ASPH.^[16]
• Panasonic Leica DG Summilux 12 mm f/1.4 ASPH.^[17]
• Panasonic Leica DG Summilux 15 mm f/1.7 ASPH.^[18]
• Panasonic Leica DG Summilux 25 mm f/1.4^[19]
• Panasonic Leica DG Summilux 25 mm f/1.4 II ASPH.^[20]