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AFP can be fractionated by affinity electrophoresis into three glycoforms: L1, L2, and L3 based on the reactivity with the lectin Lens culinaris agglutinin (LCA). AFP-L3 binds strongly to LCA via an additional α 1-6 fucose residue attached at the reducing terminus of N-acetylglucosamine; this is in contrast to the L1 isoform.
Leica Summilux-M 50 mm f /1.4 Version 2 (1961 – 1968) Leica Summilux 35 mm f /1.4 Version 1 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/1.0.
Leica 50 mm f /1.4 Summilux-R 3rd version – 1997 (ROM contacts) Leica 60 mm Macro-Elmarit-R 1st version – 1972 – outside bayonet lens hood fitting; Leica 60 mm Macro-Elmarit-R dn2 version; Leica 75 mm f /2.0 Elcan-R code C-341 – extremely rare; Leica 80mm f /1.4 Summilux-R; Elmarit-R 135 mm. Leica 90 mm f /2.8 Elmarit-R 1st version ...
Leica M lenses. 7) Elmarit 21 mm/2.8 (first retrofocus 21 mm design, in catalogue from 1980 to 1997. This lens replaced the Super-Angulon 21 mm/3.4 in production from 1963). 8) Elmarit-M 28 mm/2.8 (3rd) (excellent retrofocus lens for M rangefinder cameras, in production from 1979 until 1993) 9) Summaron 35 mm/2.8 (with and without goggles)
The M39 lens mount is a screw thread mounting system for attaching lenses to 35 mm cameras, primarily rangefinder (RF) Leicas. It is also the most common mount for Photographic enlarger lenses. True Leica Thread-Mount (LTM) is 39 mm in diameter and has a thread of 26 turns-per-inch or threads-per-inch (tpi) (approximately 0.977 mm pitch) of ...
The Summarit was initially introduced as Leica's fastest lens in 1949 with a maximum aperture of f/1.5. Since then, the Noctilux and Summilux named lenses have superseded this old aperture. [1] On 3 August 2007 Leica revived the name and announced a series of less expensive lenses, the Summarit-M.
A Leica M8 with a Leica Noctilux-M 50mm f/1 lens. Optical Diagram of Leica Noctilux 50mm f/0.95 ASPH lens. detailed view. The name Noctilux is used by Leica to designate their camera lenses with the widest maximum aperture. Lenses with that name have been in production since 1966. So far all Noctilux lenses have been made for the Leica M mount.
Leica designed a number of f/2 lenses before the Summicron, such as the Summar and Summitar. New coating technologies available after World War II allowed for the creation of the Summicron lens. The first Summicron was an evolved Summitar collapsible 50mm with Lanthanum glass, and was launched in 1953. [ 2 ]