Arducam LN011 M12 Mount 4mm Focal Length Low Distortion Camera Lens

The LN011 lens is compatible with any camera module featuring a standard M12 (S-mount) thread. This includes many Raspberry Pi camera boards, Arducam modules, and industrial vision sensors designed for interchangeable lenses. You must ensure the module's sensor size is 1/2.5" or smaller for the specified field of view, and you will need a compatible lens holder or spacer to achieve proper focus distance.

Focus is achieved by adjusting the distance between the lens and the image sensor using a lens holder or spacer tube. The lens is screwed into the holder, and the holder is mounted onto the camera board. You may need to experiment with different holder lengths (e.g., 3mm, 5mm, 8mm) to find the correct back-focal distance for your specific sensor and application. The lens itself has a fixed focus; fine-tuning is done mechanically via the holder.

Yes, the integrated 650nm IR cut filter will block most infrared light, which is beneficial for accurate daytime color reproduction but will reduce sensitivity in low-light or active IR-illuminated night vision setups. For applications requiring IR sensitivity (e.g., security with IR LEDs), you would need to select a lens without an IR filter or one with a removable filter.

The 4mm focal length on a 1/2.5" sensor has an approximate 35mm equivalent focal length of 43.25mm. This conversion is based on the crop factor of the smaller sensor, providing a field of view similar to a standard portrait lens on a full-frame camera, making it suitable for general-purpose imaging applications.