1. Introduction
The Sekonic L-508 Zoom Master is a versatile external light meter designed for precise light measurement in various photographic conditions. It is built for all-weather use and offers comprehensive capabilities for both ambient and flash light readings, including mixed lighting scenarios. Its advanced features ensure accurate exposure control for professional and enthusiast photographers.
2. Key Features
- Designed for all-weather use, ensuring reliability in diverse environments.
- Measures both reflected ambient and reflected flash, as well as mixed lighting, providing comprehensive exposure data.
- Features a 270-degree swivel head and a built-in retractable incident lumisphere for flexible measurement angles and incident light readings.
- Enables multiple flash cumulative measurement in either spot or incident mode, allowing accumulation of up to 9 flashes for complex lighting setups.
- Allows memorization of up to three readings in incident or spot mode for quick reference and comparison.
3. Product Components
Figure 3.1: Front View. This image displays the front of the Sekonic L-508 light meter, highlighting the main display screen, the ISO adjustment buttons, the Mode selection button, and the Power button. The incident lumisphere is visible at the top.
Figure 3.2: Angled View. This image provides an angled perspective of the light meter, showcasing the ergonomic design, the incident lumisphere in its extended position, and some of the side-mounted controls for operation.
Figure 3.3: Side View. This image illustrates the side of the Sekonic L-508, featuring the zoom spot lens for reflected light measurements and the Memory button, which is used to store readings.
Figure 3.4: Back View. This image shows the rear of the light meter, primarily displaying the battery compartment cover and other structural details.
4. Setup
- Battery Installation: Locate the battery compartment on the back of the meter (refer to Figure 3.4). Open the cover and insert the required batteries, ensuring correct polarity. Close the compartment securely.
- Power On: Press the Power button to turn on the light meter. The display should illuminate.
- Initial Settings: Set your desired ISO sensitivity using the ISO buttons. This should match the ISO setting of your camera.
5. Operating Instructions
5.1. Measuring Ambient Light
- Incident Light Measurement: Extend the incident lumisphere (white dome) by sliding it into position. Point the lumisphere towards the light source from the subject's position. Press the measurement button to obtain a reading.
- Reflected Light Measurement (Spot): Retract the incident lumisphere. Aim the spot meter's lens at the specific area of the subject you wish to measure. The L-508 offers a zoom spot feature for precise targeting. Press the measurement button.
5.2. Measuring Flash Light
- Flash Mode: Press the Mode button until the flash icon appears on the display.
- Single Flash: Position the meter (incident or spot mode) and trigger your flash unit. The meter will display the f-stop.
- Multiple Flash Cumulative: In flash mode, after the first flash reading, trigger subsequent flashes. The meter can accumulate up to 9 flashes, providing a combined exposure value.
5.3. Memory Function
The L-508 allows you to store up to three readings. After taking a measurement, press the Memory button (refer to Figure 3.3) to save the value. You can recall these values for comparison or averaging.
6. Maintenance
- Cleaning: Use a soft, dry cloth to clean the meter's body. For the display and lens, use a lens cleaning cloth and solution if necessary, avoiding abrasive materials.
- Storage: When not in use for extended periods, remove the batteries to prevent leakage. Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures.
- Battery Replacement: Replace batteries promptly when the low battery indicator appears on the display to ensure accurate readings.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on. | Dead or incorrectly installed batteries. | Check battery polarity; replace batteries. |
| Inaccurate readings. | Incorrect ISO setting; dirty lumisphere/lens; meter not calibrated. | Verify ISO setting; clean optical components; consult service center if calibration is suspected. |
| Display is blank or flickering. | Low battery; extreme temperature. | Replace batteries; allow meter to acclimate to room temperature. |
8. Specifications
| Model Number | 401-508 |
| Manufacturer | Sekonic |
| Item Weight | 13.6 ounces |
| Package Dimensions | 8.8 x 4.3 x 3.3 inches |
| First Available Date | September 22, 2002 |
| Measurement Modes | Incident (with Lumisphere), Reflected (Spot) |
| Light Types | Ambient, Flash, Mixed Lighting |
| Swivel Head | 270-Degree |
| Memory Function | Up to 3 readings |
| Flash Accumulation | Up to 9 flashes |
9. Warranty and Support
For detailed warranty information, please refer to the warranty card included with your purchase or visit the official Sekonic website. Technical support and service inquiries can also be directed to Sekonic's customer service department.
Official Sekonic Website: www.sekonic.com
