The black, aluminum alloy AstrHori AH-M1 Light Meter is an ultra-compact, cold-shoe-mountable light meter designed for analog film cameras. With its sleek, retro profile, it offers simple operation via a large, easy-access dial and a 0.66" OLED display. It features a 30° field of view, roughly equivalent to a 50mm lens. The light meter supports both continuous and one-time metering, as well as shutter speed readings of 32 seconds to 1/8000th of a second, ISO speeds of 5 to 6400, and apertures of f/1 to f/32. Set the correct exposure with Aperture and Shutter Priority modes, as well as three stops of exposure compensation. The unit can meter continuously for 12 hours on a full charge and charges fully in 40 minutes via USB-C port.
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Key Features
- Shoe Mount for Camera-Top Attachment
- Averages Reflected Light at 30°
- Aperture and Shutter Priority Modes
- Supports f/1 to f/32
The black, aluminum alloy AstrHori AH-M1 Light Meter is an ultra-compact, cold-shoe-mountable light meter designed for analog film cameras. With its sleek, retro profile, it offers simple operation via a large, easy-access dial and a 0.66" OLED display. It features a 30° field of view, roughly equivalent to a 50mm lens. The light meter supports both continuous and one-time metering, as well as shutter speed readings of 32 seconds to 1/8000th of a second, ISO speeds of 5 to 6400, and apertures of f/1 to f/32. Set the correct exposure with Aperture and Shutter Priority modes, as well as three stops of exposure compensation. The unit can meter continuously for 12 hours on a full charge and charges fully in 40 minutes via USB-C port.
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$79.00
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AstrHori AH-M1 Overview
AstrHori AH-M1 Specs
Key Specs
| Meter Type | |
| Spot Metering | |
| Flash Metering | |
| Light Reading Method | |
| Measuring Modes | |
| Display | |
| System Connection | |
| Battery | |
| Radio System |
| Meter Type | |
| Spot Metering | |
| Flash Metering |
Metering
| Light Reading Method | |
| Measuring Modes | |
| Aperture Range | |
| EV Range | |
| ISO Range | |
| Shutter Speed Range |
Physical
| Display | |
| System Connection | |
| Media Card Reader | |
| Tripod Mounting Thread |
General
| Battery | |
| Radio System | |
| Dimensions | |
| Weight |
Packaging Info
| Package Weight | |
| Box Dimensions (LxWxH) |
AstrHori AH-M1 Reviews
This Meter Was Off By 3-4 Stops!
By Burnes
Rated 1 out of 5
Date: 2026-02-24
This looks and feels like an amazing meter until... I tested it right out of the box in a controlled test in 4 different lighting conditions against 3 other calibrated meters. It was off 3-4 stops which shocked (and disappointed me). It has a solid great build feel and the display is awesome. The small problem is... it is useless since it is so wildly inaccurate (at least mine was).
Perfect!
By Evan
Rated 5 out of 5
Date: 2026-01-27
Great build quality, and works perfectly as described. Instructions are easy to follow to gain access to all functionality.
See any errors on this page?
Once the battery goes bad, can you replace?
Once the battery goes bad, can you replace?
You say the battery on the AstrHori AH-M1 Light Meter is not user replaceable. Is there a professional establishment that can replace the depleted battery for continued use thereafter. Or are we to presume once the battery is depleted, it is time to throw the meter away and buy a new one?
Date published: 2025-11-12
Can you see the display in full sunlight?
Can you see the display in full sunlight?
Yes, the AstrHori AH-M1 Light Meter (Black), BH #ASA20B, can be used outdoors in sunlight. As normal you will have a better view of the OLED Display when not in direct sunlight.
Date published: 2025-02-25