Maker | Minolta, Sony |
---|---|
Lens mount(s) | Minolta / Sony A-mount |
Part number | SAL-50M28 |
Technical data | |
Type | Prime |
Focus drive | screwdrive |
Focal length | 50 mm |
Image format | 135 film (24×36mm) |
Aperture (max/min) | f/2.8–32 |
Close focus distance | 0.2 m (0.65 ft) |
Max. magnification | 1:1 |
Diaphragm blades | 7 blades |
Construction | 7 elements in 6 groups |
Features | |
Manual focus override | no |
Ultrasonic motor | no |
Weather-sealing | no |
Lens-based stabilization | no |
Application | Macro |
Physical | |
Min. length | 59 mm (2+5⁄16 in) |
Diameter | 68 mm (2+11⁄16 in) |
Weight | 292 g (10+5⁄16 oz) |
Filter diameter | 55 mm |
Accessories | |
Lens hood | Lens hood |
Case | Lens case or pouch |
Angle of view | |
Diagonal | 47° |
History | |
Introduction | 1985 |
Discontinuation | 2022 |
Retail info | |
MSRP | 599 USD (as of 2015) |
References | |
[1] |
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.
The 50mm f/2.8 was one of the lenses introduced with the Maxxum 7000 in 1985. [2] 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.
Lens Spec | Minolta AF Macro 50 mm f/2.8 | Minolta AF Macro 50 mm f/2.8 (restyled) | Minolta AF Macro 50 mm f/2.8 D | Sony AF Macro 50 mm f/2.8 | |
---|---|---|---|---|---|
Model no. | SAL-50M28 | ||||
Year | 1985 | 1993 | 2001 | 2006 | |
Focal length | 50 mm | ||||
Aperture | f/2.8–32, 7-blade | ||||
Const. | Ele. | 7 | |||
Grp. | 6 | ||||
ADI | No | Yes | |||
Focus | Min. | 0.65 ft (0.2 m) | 0.66 ft (0.2 m) | ||
Limiter | Yes | ||||
AF stop | No | Yes | |||
Dims. | Dia. | 68 mm (2+11⁄16 in) | 70 mm (2+3⁄4 in) | 71 mm (2+13⁄16 in) | |
Len. | 59 mm (2+5⁄16 in) | 60 mm (2+3⁄8 in) | |||
Wgt. | 292 g (10+5⁄16 oz) | 324 g (11+7⁄16 oz) | 290 g (10+3⁄8 oz) | 290 g (10.4 oz) | |
Filter (mm) | 55 | ||||
Refs. | [3] | [4] | [1] [5] [6] |
The optical design for the 50mm f/2.8 macro lens was credited to Sho Tokumaru, [8] 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. [7]
Konica Minolta, Inc. is a Japanese multinational technology company headquartered in Marunouchi, Chiyoda, Tokyo, with offices in 49 countries worldwide. The company manufactures business and industrial imaging products, including copiers, laser printers, multi-functional peripherals (MFPs) and digital print systems for the production printing market. Konica Minolta's Managed Print Service (MPS) is called Optimised Print Services. The company also makes optical devices, including lenses and LCD film; medical and graphic imaging products, such as X-ray image processing systems, colour proofing systems, and X-ray film; photometers, 3-D digitizers, and other sensing products; and textile printers. It once had camera and photo operations inherited from Konica and Minolta but they were sold in 2006 to Sony, with Sony's Alpha series being the successor SLR division brand.
Minolta Co., Ltd. was a Japanese manufacturer of cameras, camera accessories, photocopiers, fax machines, and laser printers. Minolta Co., Ltd., which is also known simply as Minolta, was founded in Osaka, Japan, in 1928 as Nichi-Doku Shashinki Shōten. It made the first integrated autofocus 35 mm SLR camera system. In 1931, the company adopted its final name, an acronym for "Mechanism, Instruments, Optics, and Lenses by Tashima".
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