Holding a camera with both hands, holding a rabbit cage and a kettle handle (Top Handle / Side Handle), ergonomic torque reduction

1. The biomechanical disaster of holding the camera with one hand: microscopic tearing of the flexor carpi ulnaris muscle of the wrist

Why are videos shot with bare metal handheld so easy to shake due to fatigue?

• Fatal Cantilever Lever Torque (Torque = Force × Distance):
• The built-in handle on the right side of the camera body is designed for "static photography held with one hand in the right hand";
• The heavy lens, weighing 1kg, extends forward 15cm~20cm from the body;
• This forward tilting moment completely relies on several tiny ligaments of the right wrist joint to fight against the ulnar muscle group;
• Physiological causes of micro-vibration:
• As the muscles rapidly accumulate lactic acid and enter the fatigue tremor phase, the neurons in the right hand begin to involuntarily release involuntary muscle fiber twitches;
• There are high-frequency, irregular small bumps and shakes in the screen. Even if anti-shake is turned on, it cannot cover up the large breathing fluctuations caused by fatigue.

2. Dual Side Handles: Unload the torque to the core of the chest

Install a pair of ergonomic wooden or silicone side handles (Side Handles) on both sides of the camera's all-inclusive aluminum rabbit cage:

1. Mechanical fulcrum expansion and physical damping amplification:

• The width of the two-hand grip is expanded from 5cm for one-hand grip to 25cm ~ 30cm;
• The rotational moment of inertia (Moment of Inertia) is increased several times. Tiny external bumps need to overcome a much larger moment arm inertia. The left and right roll (Roll axis) bumps of the screen are naturally reduced by more than 60%!

2. Biomechanical load transfer to large muscle groups:

• The arms are naturally close to the ribs, and the wrists are in an absolutely naturally relaxed vertical neutral position (Neutral Position);
• The weight-bearing is completely transferred from the fragile wrist joint to the powerful core muscle groups such as deltoid, biceps, latissimus dorsi and pectoralis major**;
• The battery life of continuous high-intensity handheld lens operation is directly increased from 10 minutes to several hours.

3. The magic of low-angle ground-mounted mirroring with the Top Handle

The top handle installed on the top of the rabbit cage is a standard feature for cinematographers:

• Pendulum Weightless Physical Balance:
• Place the load-bearing point of the pot handle above the vertical line of the center of gravity of the entire camera system**;
• The device changes from "hard support upwards" to "natural hanging downwards", just like carrying a bucket in compliance with the law of gravity;
• Low-Angle Tracking Shot:
• When photographing children running, pets chasing each other, or skateboards gliding, the photographer does not need to lie on the ground in embarrassment;
• Bend over and lift the pot handle upside down with one or both hands. The camera is only 10cm away from the ground. As you trot forward, the entire system presents a natural pendulum stability like a physical Steadicam, creating a strong sense of visual immersion.

4. Industrial safety and anti-detachment guidelines for the rabbit cage and handle connection interface

Equipment worth tens of thousands of yuan is suspended in the air, and the physical strength of the connecting accessories is related to the life and death of the equipment:

1. It is strictly prohibited to lift heavy equipment solely by the cold shoe! ：

• Many cheap handles are attached to the top of the machine via a cold shoe;
• The industry standard cold shoe is designed for lightweight microphones with a load capacity of only 100g, and its aluminum alloy slot is only 1mm thick;
• When a heavy-duty lens is pulled up and shakes violently, the metal of the cold shoe is easily prone to metal fatigue fracture, and the whole machine instantly falls to the ground and is shattered!

2. NATO Rail - extremely fast disassembly and assembly and physical anti-removal safety lock:

• The first choice for side handles and pot handles is NATO rail clamping standard;
• Both ends of the guide rail must be equipped with spring-pressed Safety Stop Pins. Even if the fastening handle is accidentally loosened, the pot will not slide directly off the guide rail and fall off.

3. Arri Locating Pins Double Pin Dead Lock: The bottom of the kettle is equipped with 3/8-16 screws and two rigid positioning protruding pins, which completely seals the freedom of rotation and looseness in the physical structure.

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