Mamiya 210mm f/4.5 APO-Sekor Z (1988)
A short telephoto prime lens for the Mamiya RZ67 medium format system, with apochromatic correction and a built-in Seiko #1 shutter.
Overview
This is a manual focus, short telephoto prime made only for the Mamiya RZ67 system. It was announced in 1988 and was the shortest focal length in the Mamiya RZ APO series. It covers the medium format 6x7 frame. The apochromatic correction brings all three primary colors to the same image plane, which improves color accuracy and sharpness. The built-in Seiko #1 electronic leaf shutter runs from 1 second to 1/400s, plus T mode.
Specifications
| Focal length | 210mm |
| Maximum aperture | f/4.5 |
| Minimum aperture | f/32 |
| Aperture blades | 8 |
| Focus type | Manual focus |
| Lens mount | Mamiya RZ |
| Maximum format | Medium format 6x7 |
| Optical construction | 7 elements in 5 groups |
| Minimum focus distance | 1.43m |
| Filter size | 77mm |
| Shutter | Seiko #1 leaf, 1s - 1/400s + T |
| Size | 145 x 97 mm |
| Equivalent focal length | 102mm (35mm equivalent) |
| Series | APO-Sekor Z |
Design
The apochromatic correction focuses red, green, and blue light on the same plane. The Seiko #1 electronic leaf shutter sits inside the lens barrel, so flash syncs at all shutter speeds. The optical formula is 7 elements in 5 groups, and the front takes 77mm filters.
Market
The lens was discontinued after an unknown production run. The available sources document no original pricing and no current market values.
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