YS Lens Adapter For M42 Cameras
Mount YS lenses to any Pentax screw camera.
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YS to Pentax (M42) Screw Mount Auto T System
YS Adapter to Pentax (M42) Screw Mount
- Maintains Auto Aperture
- For all YS Lenses To M42 Screw Mount Cameras
YS to Pentax (M42) Screw Mount Front
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YS to Pentax (M42) Screw Mount Back
This is a YS lens mount for any Pentax - M42 screw mount camera. It maintains the auto aperture feature of the camera. This YS adapter screws on and requires no other adjustments.
The YS mount is basically an auto diaphragm T-mount system. It utilizes the same dimensions and thread pitch as a T-mount. The point of the YS system was to have an auto lens that could be used on any auto camera with the correct YS adapter, while allowing the retention of that camera's auto diaphragm system.