The Som Berthiot Pan-Cinor 17.5-70mm f/2.4 C-Mount is a vintage, high-quality zoom lens for 16mm cine cameras, such as those made by Bolex and Arriflex. It is a well-regarded lens known for its solid construction and image quality.
Som Berthiot Pan-Cinor 17.5-70mm f/2.4 C-Mount Zoom
Optical performance
- The lens is praised for its nice image quality, with smooth zoom action throughout the range.
Focusing
- The lens generally holds focus well through the zoom range, though it may require calibration with some camera adapters.
Modern usage
- Today, this lens is a collector's item and is also used by filmmakers and cinematographers seeking a classic vintage film look. It can be adapted for use on modern digital cameras, but this may require special adapters and careful back focus adjustment.
Manufacturer-
Som Berthiot, a French company.
Lens series
- Pan-Cinor.
Focal length
- 17.5–70mm zoom range.
Maximum aperture
- f/2.4.
Mount type
- C-mount
Viewfinder
- Models intended for non-reflex cameras included a side viewfinder that provided a parallax-corrected view.
Zoom control
- A built-in zoom lever provides smooth, dampened zoom operation.

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