AstrHori AH-M1 Light meter

Description

The AstrHori AH-M1 is a light meter designed primarily for users of analogue cameras and enthusiasts of manual photography. The device is made of aluminium and equipped with a cold shoe. It offers measurement in the range of EV1–EV22 and two priority modes – aperture or time. A large dial and a clear backlit screen ensure convenient operation. The AstrHori AH-M1 light meter works for up to 12 hours on a single charge. It allows you to define the ISO sensitivity value in the range from 5 to 6400, as well as shutter speeds from 32 s to 1/8000 s. There is also exposure compensation (±3 EV). It is an excellent tool for those who shoot with analogue cameras, use fully manual lenses or simply want to precisely control exposure without relying on the camera’s automatic settings.

Main product features

• Compact light meter for analogue and digital cameras
• Lightweight aluminium housing
• adjustable cold shoe position (Allen key included)
• averaged light measurement from a viewing angle of approx. 30°
• two operating modes: aperture priority (A) and shutter priority (T)
• EV1–EV22 (ISO 100) measurement range – measurement from very dark to bright scenes
• shutter speeds 32 s – 1/8000 s – from long exposures to fast shots
• Aperture range from f/1 to f/32 – better control of depth of field
• Wide ISO range of 5–6400 – work in bright and very low light
• Exposure compensation ±3 EV – easier brightness correction
• Clear 0.66-inch OLED screen
• Simple operation with a single dial and button
• Fast single measurement (≤ 0.5 s)
• 120 mAh battery – up to 12 hours of continuous operation
• Fast charging via USB-C port (approx. 40 minutes)
• Automatic sleep mode and shutdown after 3 hours
• Can also be used handheld, without mounting on a camera
• Ideal for cameras without a built-in light meter
• Useful tool when working with video material

Precise measurements in analogue style

The AstrHori AH-M1 is a light meter designed for photographers who want full control over exposure – whether they work with a classic rangefinder, analogue SLR or other camera that does not offer light measurement. The device takes an average measurement from a 30° viewing angle, which perfectly matches the perspective of a standard 50 mm lens. This ensures that the results are precise and easy to translate into real exposure settings. The AstrHori AH-M1 light meter helps you work consciously, especially where the camera’s automatic settings fail – in bright sunlight, in difficult contrast or when taking night-time photos.

A and T modes – exposure always under control

The AstrHori AH-M1 light meter offers two operating modes: aperture priority (A) and shutter priority (T). In A mode, you only set the aperture – the light meter will calculate the correct exposure time. In T mode, you do the opposite: you select the shutter speed and the device gives you the optimal aperture. This is ideal for street photography, travel photography or working with black and white film, where exposure consistency and repeatability of results are key.

Wide range of parameter adjustments

The AstrHori AH-M1 light meter impresses with its range of capabilities. It allows you to work with ISO sensitivities from 5 to 6400, apertures from f/1 to f/32, and shutter speeds from 32 seconds to 1/8000 s. This makes it ideal for both night photography and shooting in bright sunlight. The ±3 EV exposure compensation also allows for conscious adjustments. This is particularly useful in difficult lighting conditions, when dealing with high contrast, snow, sand or strong point light sources. Such a wide range of settings makes the AstrHori AH-M1 light meter a versatile tool, suitable for both vintage retro cameras and modern models with a limited range of parameters.

Intuitive operation and clear OLED screen

The AstrHori AH-M1 light meter was designed with ease of use in mind. The device is equipped with one large knob, one button and a clear 0.66-inch OLED screen. All parameters – ISO, compensation, time, aperture, operating mode – are visible even in strong daylight. The ergonomics of the device make it quick and convenient to use, even when wearing gloves. This light meter really speeds up your work and allows you to focus on the frame rather than the settings. It is ideal for street photographers and creators who work on the move and don’t want to waste time digging through menus.

Solid aluminium construction for years

The AstrHori AH-M1 light meter is made of aluminium, making it durable, lightweight and resistant to everyday use. It weighs only 48 g, so it won’t weigh down your camera or bag. The cold shoe mount can be precisely adjusted to the light meter (Allen key included) to make it compatible with your camera and ensure that it does not obstruct the dials or viewfinder. The device can also be used outside the camera body, holding it in your hand like a classic handheld light meter.

Ready for long sessions

The built-in 120 mAh battery provides up to 12 hours of continuous measurement. After 25 seconds of inactivity, the device goes into sleep mode and automatically turns off after approximately 3 hours. A full charge via the USB-C port takes about 40 minutes. All you need is the included cable, which you can connect to a power bank or smartphone charger, for example. The universal charging system offered by the AstrHori AH-M1 light meter is a huge advantage during long outdoor sessions, travel and film work.

A universal choice

The measurement range offered by the AH-M1 light meter – from EV1 to EV22 (at ISO 100) – covers both very low light and full sunlight. This makes the device suitable for almost any situation: from interiors and night shots to outdoor photography at midday. Fast reading (less than 0.5 seconds) allows you to react immediately, which is crucial in changing lighting conditions. The AstrHori AH-M1 light meter remains accurate even in difficult and uneven lighting conditions – on the street, at concerts or at night.

Filmmakers love this light meter too!

The AstrHori AH-M1 light meter is also perfect for video production – especially where exposure repeatability is crucial. It allows you to precisely set the brightness of your shots when working with fully manual lenses or in situations where you want consistent exposure between scenes. With aperture and shutter priority modes, you can quickly adjust settings to changing lighting conditions, and exposure compensation lets you consciously build the mood of the frame – from bright, documentary-style shots to more cinematic, high-contrast lighting. The AstrHori AH-M1 also helps to avoid exposure fluctuations, which makes subsequent editing and colour correction easier.

Specification

• model: AstrHori AH-M1
• material: aluminium
• screen: 0.66-inch OLED
• measurement angle: approx. 30°
• measurement range: EV1–EV22 (ISO 100)
• aperture range: f/1–f/32
• exposure time range: 32 s – 1/8000 s
• ISO range: 5–6400
• exposure compensation: ±3 EV
• Operating modes: A (aperture priority), T (shutter priority)
• Power supply: 120 mAh battery
• Operating time: up to approx. 12 hours of continuous measurement
• single measurement time: ≤ 0.5 s
• charging: USB-C port, approx. 40 min
• dimensions: 38 x 26 x 14 mm
• weight: 48 g

Contents of the set

• AstrHori AH-M1 light meter
• USB-A to USB-C cable
• Allen key