Mamiya 150mm f/4.5 Lens for Mamiya 6
An interchangeable lens with built-in electronic leaf shutter, designed for the Mamiya 6 rangefinder camera.
Overview
This is the 150mm f/4.5 lens made for the Mamiya 6 rangefinder camera, one of three interchangeable lenses in the system alongside the 50mm and 75mm. Introduced in May 1989 as part of the Mamiya 6 system, it was still available new in December 2003 through a special offer from Mamiya America Corporation, though the lens is no longer in production. It features its own electronic leaf shutter, allowing shutter speeds from 4 seconds to 1/500, plus Bulb, with flash sync available at all speeds. The lens collapses about 1.5 inches into the camera body when not in use, a design trait shared with the other Mamiya 6 lenses.
Specifications
| Focal length | 150mm |
| Maximum aperture | f/4.5 |
| Minimum aperture | f/32 |
| Diaphragm blades | 5 |
| Optical construction | 6 elements in 5 groups |
| Filter thread | 67mm metal |
| Minimum focus | 1.8m (6 feet) |
| Weight | 480g (16.9 oz) |
| Dimensions | 86mm (3.4") long, 70mm (2.8") diameter |
| Shutter type | Electronic leaf shutter |
| Shutter speed range | 4 seconds to 1/500, plus Bulb |
| Flash sync | All speeds, including 1/500 |
| Collapsible | Retracts about 1.5 inches into camera body |
| Viewfinder indication | Square in the center shows 150mm frame |
| Included accessory | Screw-in metal lens hood |
Design
The lens contains its own electronic leaf shutter, eliminating the need for a body-mounted shutter. Electronic shutter control ensures precise timing, especially at slower speeds, and the shutters never require calibration. Shutter operation is manual in full-stop increments, while automatic exposure provides stepless control.
Context
The Mamiya 6 system, launched in May 1989 and produced until 1999, offered a rare combination of medium format, rangefinder design, and interchangeable lenses. The 150mm f/4.5 was part of the original trio of lenses and remains a compact, high-performance telephoto option. All three lenses in the system are praised for their optical quality, with this lens noted for sharpness at every aperture and no visible light falloff even wide open.
Market
A used example was purchased by reviewer Ken Rockwell for $799, and a special offer from Mamiya America Corporation in December 2003 listed the lens at $799, suggesting it was still available new at that time. No data on common failures, maintenance, or spare parts availability is available.
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