- Source: Minolta AF Macro 50mm f/2.8
Originally produced by Minolta, and later produced by Sony, the AF Macro 50mm f/2.8 is a macro prime photographic lens compatible with cameras using the Minolta A-mount and Sony A-mount lens mounts.
History and design
The 50mm f/2.8 was one of the lenses introduced with the Maxxum 7000 in 1985. It later was updated in a second version with an identical optical design and restyled cosmetics, which added a focus hold button. A third version was released in 2001 with a larger rubber focus ring and an 8-pin electronic interface for use with "D" series flashes and bodies; this was subsequently adopted and re-released by Sony after it acquired the camera division of Konica Minolta in 2006.
The optical design for the 50mm f/2.8 macro lens was credited to Sho Tokumaru, featuring a "double floating" element design, which incorporated zoom lens technology to move three groups independently at slightly different rates during focusing to improve lens performance over a wide range of focusing distances.
See also
List of Minolta A-mount lenses
list of other A-mount lenses
References
External links
Dyxum lens data
Sony: SAL-50M28: 50mm F2.8 Macro Lens