Mamiya 210mm f/4.5 APO-Sekor Z (1988)
A short telephoto prime lens for the Mamiya RZ67 medium format system, featuring apochromatic correction and a built-in Seiko #1 shutter.
Overview
This is a manual focus, short telephoto prime lens designed exclusively for the Mamiya RZ67 system. Announced in 1988, it was the shortest focal length in the Mamiya RZ APO series. It supports medium format 6x7 imaging and features apochromatic correction to align all three primary colors on the same image plane, improving color accuracy and sharpness. The lens includes a built-in Seiko #1 electronic leaf shutter with speeds 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 lens features apochromatic correction, designed to focus red, green, and blue light on the same plane for superior color fidelity. It houses the Seiko #1 electronic leaf shutter, integrated into the lens barrel, enabling flash synchronization at all shutter speeds. The optical formula consists of 7 elements in 5 groups, and the front accepts 77mm filters.
Market
The lens was discontinued after an unknown production run. No original pricing or current market values are documented in the available sources.
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