The AstrHori AH-M1 light meter can continuously track the changing light values in real-time, It has two metering modes, A and T modes. With known ISO sensitivity and shutter speed, the light meter provides the correct aperture value for proper exposure. Alternatively, with known ISO sensitivity and aperture value, it provides the correct shutter speed for proper exposure, ensuring the intensity of light meets the requirements of the shot.
The cold shoe position is adjustable to be compatible with various old cameras. Using the included L-shaped hex wrench, the cold shoe position can be adjusted to the left, right, center, or inverted to accommodate old cameras with dials or obstacles around the cold shoe.
Equipped with a built-in 120mAh lithium battery, the AstrHori AH-M1 light meter can continuously measure light for about 12 hours. It uses a USB-Type-C charging port and can be charged with a 5V power source. It takes approximately 40 minutes to fully charge (Tested by computer's USB port). If there is no operation for 10s or 25s, it will enter a low-power sleep state and automatically shut down after about 3 hours of sleep.
Equipped with a 0.66-inch electronic display screen, it shows real-time exposure parameters such as exposure value and exposure compensation, shutter speed, aperture value, ISO, battery level, aperture/shutter priority (A/T), lock icon, and loop mode.
