Arducam LK004 CS-Mount Lens Kit for Raspberry Pi HQ Camera, 6-25mm Focal Lengths, Pack of 5

First, remove any existing lens from the HQ Camera's CS-mount thread. Select the desired lens from the LK004 kit. Carefully screw it clockwise into the camera's threaded mount until it is snug. Use the included back focus adjustment ring on the HQ Camera to fine-tune the focus if needed. Ensure the lens is seated squarely to avoid cross-threading. The process is tool-free and designed for quick swaps between different focal lengths for your project.

Within the Arducam LK004 kit, only the 12mm (CS1812ZM03) and 16mm (CS2316ZM02) focal length lenses feature a manual aperture adjustment ring. This ring is located on the lens barrel. Rotating it changes the aperture opening, allowing you to control the amount of light entering the sensor and influence depth of field. The other three lenses (6mm, 8mm, 25mm) have fixed apertures optimized for their respective focal lengths and cannot be adjusted.

These lenses are specifically selected for the Raspberry Pi HQ Camera, which uses a Type 1/2.3" sensor (IMX477) and a CS-mount interface. They are physically compatible with any camera system that uses a standard CS-mount and a similar or smaller sensor size (1/2.3" or 1/3"). However, for optimal performance without vignetting, the sensor's active area must match the lens's designed image circle. Using them with mismatched sensor formats may result in dark corners or reduced image quality.

The Minimum Object Distance (MOD) varies by lens model within the kit. The 25mm, 16mm, and 12mm lenses have an MOD of approximately 0.2 meters (20 cm). The 8mm and 6mm wider-angle lenses have a slightly longer MOD of about 0.3 meters (30 cm). This means you must place your subject at least this distance from the lens to achieve sharp focus. For macro or extreme close-up work, you may need additional extension tubes or close-up filters.