Key benefits - Solves the problem of having to move your hand to press the shutter while diving, allowing you to trigger the camera without direct finger pressure on the shutter button. - Lever-action mechanism uses the tail of the movable block to depress the front end, engaging the camera shutter through a linked movement while avoiding direct button press. - The front end of the movable block is equipped to interact with the mechanism, causing the movable block to rebound and drive the connecting components (connecting block, sliding plate, and fixed pillar) to touch the camera shutter precisely. - Ergonomic design provides a comfortable trigger position that fits your finger, and the elevation-angle design helps prevent slipping during underwater shooting. - Suitable for DSLR cameras, offering a practical solution for underwater photography where direct shutter pressing is inconvenient. How it works - The device uses a lever mechanism at the tail of a movable block. Pulling the lever depresses the front end of the movable block. - The front end interacts with its coupling element, causing the movable block to rebound and transfer motion to the connecting block, sliding plate, and fixed pillar. - This movement touches the camera shutter, enabling triggering without pressing the shutter directly with your finger. Compatibility - Designed for DSLR cameras. - Specific models are not listed; suitable for standard DSLR configurations using the shutter-extension lever concept. Use scenarios - Underwater macro photography: Trigger precise shots without altering your hand position or casting extra movement that could disturb delicate macro subjects. - Reef or action underwater shoots: Maintain control and timing while shooting in currents or with moving subjects, reducing the need for direct finger pressure on the shutter. - Underwater video shoots: Provide stable, consistent shutter activation while keeping your hand free for stabilization and framing, helping to maintain smooth footage.