Arducam LN004 1/2.5" 3.6mm M12 Mount Camera Lens

No, the official Raspberry Pi Camera Module V2 uses a fixed lens board without an M12 thread. To use this LN004 lens, you must install a separate M12 lens holder adapter onto the Camera Module V2's sensor board, which replaces the original lens. The LN004 is designed for cameras that natively support the M12 mount, such as specific Arducam modules.

This lens is designed for direct compatibility with Arducam modules that feature a native M12 lens mount, primarily the B0031 (using the OV5647 sensor) and the B0103 (using the IMX219 sensor). You simply screw the LN004 lens into the module's threaded mount. For other cameras, verify they have a standard M12 (S-Mount) thread. Always handle the lens carefully to avoid cross-threading during installation.

Focus is adjusted mechanically by rotating the lens barrel. First, loosen the small locking set screw on the side of the lens barrel using a suitable hex key. Then, gently rotate the barrel while viewing a test image on your connected computer (e.g., using `libcamera-hello` on Raspberry Pi). Once optimal sharpness is achieved at your desired working distance, tighten the set screw to lock the focus in place, preventing it from shifting during operation.

Yes, the 650nm IR filter blocks infrared light above 650nm, which is essential for accurate color reproduction under normal visible light. However, this means the lens is not suitable for dedicated night vision or IR illumination projects that rely on 850nm or 940nm IR LEDs. For such applications, you would need a lens without an IR filter or with a specific IR-pass filter to allow infrared wavelengths to reach the sensor.