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The Mamiya Ruby is a leaf-shutter fixed-lens rangefinder introduced by Mamiya starting in September 1959. It features a coupled selenium match-needle lightmeter. This model was offered initially with a Mamiya-Sekor T 48mm f/2.8 lens and later with a Mamiya-Sekor F 48mm F/1.9 lens. The shutter is a Copal SVK. The f/2.8 version was sold in the Unites States by Sears as the Tower 10A and the f/1.9 version as the Tower 18A.
Technical specifications Edit
- Type: 35mm
- Released: September 1959 (f/2.8) and May 1960 (f/1.9)
- Original Price: ¥ 18,500 (f/2.8) and ¥ 22,800 (f/1.9)
- Image size: 24 × 36mm
- Mamiya-Sekor T 48mm f/2.8 (3 elements in 3 groups)
- Mamiya-Sekor F 48mm F/1.9 (6 elements in 4 groups)
- Viewfinder: Reverse Galilean viewfinder, automatic parallax correction
- Focusing: Double image coincidence rangefinder
- Magnification 0.66
- Baseline length 31.5mm
- Effective baseline length 20.8mm
- Shutter: Copal SVK leaf shutter with self-timer, B + 1 - 1/500
- Flash Sync: M · X contact (full sync)
- Film Advance: Lever (175 degrees)
- Exposure Metering: Built-in selenium meter with coupled match needle (visible on top only)
- Size and weight: 79 × 131 × 72mm · 680g (f/2.8) or 79 × 131 × 73mm · 774g (f/1.9)