Kodak Ektar 203mm f/7.7 Large Format Lens
The Kodak Ektar 203mm f/7.7 (often misread as f/77) with a “Mount 370” cell housed in a Copal No. 0 shutter is a custom or adapted large-format lens setup combining classic mid-century American optics with a modern, reliable Japanese leaf shutter
Key Specifications
Focal Length: 203mm (approx. 8 inches), acting as a normal-to-slightly-long focal length on 4×5 film and a standard lens on 5×7 film.
Maximum Aperture: f/7.7 (stopping down to f/45).
Optical Design: 4-element, 4-group air-spaced dialyte/tessar-type construction.
Mount Type: Mount 370 (originally designed to screw into proprietary shutters like the European Epsilon). Photographers often remount these cells directly into a standard Copal #0 shutter for modern reliability.
Shutter: Copal No. 0 (mechanical, reliable, featuring standard speeds like 1s–1/500s or B depending on the exact Copal model used.
Performance and Characteristics
Optical Quality: Renowned for incredible sharpness, high resolving power, and wonderful color correction (originally engineered heavily for color transparency film). It performs remarkably well even wide open at f/7.7
Coverage: Designed primarily to cover 4×5 and 5×7 formats with limited movements.
Portability: Because the maximum aperture is a modest f/7.7, the glass elements are small and lightweight, making this a legendary field and backpacking lens for large format shooters, especially when housed in a light Copal #0 body
The Kodak Ektar 203mm f/7.7 is not a lens that snaps onto a standard consumer camera. Instead, it is a large-format lens meant to be mounted onto specific types of customizable modular cameras
The primary cameras you can use with this lens include:
Large-Format Field and View Cameras (Native Intent)
Because this lens provides a large image circle, its native purpose is to be mounted onto a lens board and clipped into a large-format film camera
4×5 Field Cameras: This is the most common use. Because the lens is lightweight and tiny, backpacking photographers frequently mount it to portable folding field cameras like the Chamonix 45 Shen Hao, Tachihara, or vintage Graflex Pacemaker Speed Graphic / Crown Graphic cameras.
5×7 View Cameras: The lens covers the 5×7 film format perfectly. It was historically bundled with studio or field bodies like the vintage Kodak 2D 5×7 view camera
The lens is in excellent used cosmetic condition, please see photo provided.
Optically clean and clear.
Aperture Selection is positive.
Shutter is working across the range.
Tested and working.
Any questions, please ask.
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