1. Introduction
Thank you for choosing the Metz 48 AF-1 Shoe Mount Flash. This advanced flash unit is designed to provide versatile and powerful lighting for your Sony Alpha Digital Camera. It features a robust guide number, flexible control options, and the ability to update firmware via USB, ensuring compatibility and performance for various photographic needs.
This manual provides detailed instructions for the proper setup, operation, and maintenance of your Metz 48 AF-1 flash unit. Please read it thoroughly before use to ensure optimal performance and longevity of your device.
2. Safety Information
- Do not expose the flash unit to water or high humidity.
- Do not attempt to disassemble or repair the unit yourself. Refer all servicing to qualified personnel.
- Keep the flash unit away from direct sunlight and high temperatures.
- Use only the specified AA batteries. Ensure correct polarity when inserting batteries.
- Avoid direct eye contact with the flash light, especially at close range, as it can cause temporary vision impairment.
- Keep out of reach of children.
3. Package Contents
Please check that all the following items are included in your package:
- Metz 48 AF-1 Shoe Mount Flash Unit
- Protective Pouch
- Instruction Manual (this document)
Note: Batteries are not included and must be purchased separately.
4. Product Overview
Familiarize yourself with the main components of your Metz 48 AF-1 flash unit.

Figure 1: Front view of the Metz 48 AF-1 Shoe Mount Flash. This image displays the flash head, the main control panel with buttons and LCD screen, and the hot shoe mount at the base. The flash head is shown in a neutral, forward-facing position.
Key Features:
- Guide Number: GN 118F (48m) at ISO 100 and 50mm, GN 158F at 105mm.
- Upgradeable Firmware: Via USB connection.
- Flexible Head: Tilt and Swivel capabilities for bounce flash.
- Auto Zoom Head: Covers focal lengths from 24-105mm (35mm format).
- Built-in Wide Angle Reflector: For 18mm coverage.
- Manual Flash Mode: Output from 1/128 to 1/1 power.
- TTL Compatibility: Fully compatible with Sony Alpha TTL systems.
- Wireless Operation: Functions as a TTL slave unit.
5. Setup
5.1. Battery Installation
- Locate the battery compartment cover on the side or back of the flash unit.
- Slide or open the cover according to the indicator.
- Insert four (4) AA-size batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Close the battery compartment cover securely.
Note: Use high-quality alkaline or rechargeable NiMH AA batteries for best performance.
5.2. Mounting the Flash on Your Camera
- Ensure your camera is turned off.
- Slide the flash unit's mounting foot into your camera's hot shoe.
- Secure the flash by tightening the locking wheel or lever on the flash unit's foot until it is firmly attached. Do not overtighten.
- Turn on your camera and then the flash unit. The flash should automatically detect the camera's system.
6. Operating the Flash
6.1. Power On/Off
Press and hold the power button (usually marked with ON/OFF or a power symbol) to turn the flash unit on or off. The LCD display will illuminate when the unit is on.
6.2. Flash Modes
The Metz 48 AF-1 supports various flash modes. Use the mode button on the control panel to cycle through available modes.
- TTL Mode: (Through-The-Lens) The flash output is automatically controlled by your camera's metering system for balanced exposure. This is the recommended mode for most situations.
- Manual Mode: Allows you to manually set the flash output from 1/1 (full power) down to 1/128 power in increments. This mode offers precise control for creative lighting.
- Wireless TTL Slave Mode: The flash can be triggered remotely by your camera's built-in flash (if it has a commander mode) or another master flash unit. The flash output is still controlled by TTL metering.
6.3. Adjusting the Flash Head
The flash head can be tilted and swiveled to direct light for bounce flash photography, which creates softer, more natural-looking illumination.
- Tilt: The flash head can be tilted upwards (e.g., 90 degrees) to bounce light off ceilings.
- Swivel: The flash head can be swiveled horizontally (e.g., 180 degrees left and 90 degrees right) to bounce light off walls.
Always ensure the flash head clicks into position after adjustment.
6.4. Using the Wide-Angle Diffuser
For wider lens coverage (down to 18mm), pull out the built-in wide-angle diffuser panel located within the flash head. Push it back in when not needed.
6.5. Auto Zoom Function
The flash head automatically adjusts its zoom position to match the focal length of your lens (24-105mm equivalent) for optimal light distribution. This function operates automatically when the flash is mounted on a compatible camera.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the flash unit. For stubborn dirt, slightly dampen the cloth with water. Do not use solvents or abrasive cleaners.
- Storage: When not in use for extended periods, remove the batteries to prevent leakage. Store the flash in its protective pouch in a cool, dry place, away from direct sunlight.
- Hot Shoe Contacts: Keep the hot shoe contacts clean and free from dust or debris to ensure proper communication with your camera.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Flash does not fire. |
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| Flash output is too weak/strong. |
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| Flash does not communicate with camera. |
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9. Firmware Updates
The Metz 48 AF-1 flash unit features a unique USB connection that allows for firmware updates. This ensures your flash remains compatible with new camera models and benefits from performance enhancements.
To update the firmware:
- Visit the official Metz website for the latest firmware downloads and instructions.
- Download the appropriate firmware file for your 48 AF-1 model.
- Connect the flash unit to your computer using a compatible USB cable.
- Follow the on-screen instructions provided by the Metz firmware update utility.
Always ensure the flash unit has sufficient battery power before starting a firmware update. Do not disconnect the USB cable during the update process.
10. Specifications
| Model Number | MZ 48317S |
| Guide Number | GN 118F (48m) at ISO 100 and 50mm, GN 158F at 105mm |
| Compatible Mountings | Sony Alpha |
| Power Source | 4 x AA batteries |
| Zoom Range | 24-105mm (auto zoom), 18mm with wide-angle diffuser |
| Flash Modes | TTL, Manual, Wireless TTL Slave |
| Head Movement | Tilt & Swivel |
| Connectivity | Wired (Hot Shoe), USB for firmware updates, RF Wireless Communication Technology (for slave mode) |
| Item Weight | 1.35 pounds (approx. 612g) |
| Package Dimensions | 8.8 x 6.1 x 3.9 inches |
11. Warranty and Support
Metz products are manufactured to high quality standards and are covered by a limited warranty against defects in materials and workmanship. The specific terms and duration of your warranty may vary by region and purchase date.
For detailed warranty information, technical support, or service inquiries, please visit the official Metz website or contact your local authorized Metz dealer or service center. Please retain your proof of purchase for warranty claims.
Metz Official Website: www.metz.de/en/





