A wide-angle lens by Angenieux of France, the 28mm f3.5 Type R11, offered here in the Alpa-mount auto-aperture version. The Type R11 was introduced in 1953, and this example dates from 1960. It is a retrofocus design with 6 elements in 6 groups, finished in a slightly glossy matte chrome. Production numbers are relatively low, though a black-barrel auto-aperture version also exists.
Its aperture mechanism is quite elaborate, allowing the user to change f-stops by turning a dial, a construction that tends to trouble repair technicians. The lens is equipped with a lever to switch between auto and manual aperture modes.
Angenieux Type R11 lenses were supplied in a wide variety of mounts, including Exakta, M42, Alpa, Praktina, Rectaflex, and Leica.

There is some lifting and flaking of the plating on the side of the lens barrel base due to age. It is a slight pity considering the otherwise minimal signs of use, but it is well suited for practical shooting without worry.
Fully overhauled in October 2025. This type is known for being difficult to service, yet thanks to thorough maintenance, the aperture dial, helicoid, and auto-aperture switching lever all operate with remarkable smoothness. The glass shows no noticeable cleaning marks and no haze.
Comes with non-original front and rear caps.