Mastering the use of a light meter is the single most effective step you can take to consistently achieve perfect exposure in your photography. While modern cameras offer sophisticated metering systems, they are often fooled by extreme contrast or bright backgrounds, leading to underexposed shadows or blown-out highlights. The Sekonic brand stands as the industry standard for professional photographers, renowned for building durable, accurate, and intuitive meters that remove the guesswork from lighting. This guide will walk you through the fundamental principles and advanced techniques for using a Sekonic light meter to take complete control of your lighting.
Understanding Incident vs. Reflected Light
Before you can use a Sekonic meter effectively, you must understand the two primary methods of metering, as the device is designed to handle both. The first is incident metering, which measures the light falling *on* your subject. This is the most accurate way to determine the actual light your subject is receiving, regardless of how reflective or dark their clothing or the background is. The second method is reflected metering, which measures the light bouncing *off* your subject. While cameras do this automatically, using a Sekonic in reflected mode allows you to meter for specific highlights or shadows in a scene to create a specific creative look.
Setting Up Your Sekonic Meter
Getting started with a Sekonic flash meter, such as the popular Integra or L-858D models, involves a few simple initial configurations. First, ensure the sensor is fully extended and clean, as dust or fingerprints can affect accuracy. Next, you must set the ISO speed, which matches the speed rating of your film or digital sensor. Most modern Sekonic units feature a large, easy-to-read display and intuitive buttons for navigating through the measurement modes. Taking the time to correctly input your film speed and the desired f-stop or shutter speed at the beginning of your session is crucial for the meter to calculate the correct exposure values.
Taking an Incident Light Reading
To take an incident reading, you attach the white dome diffuser to the top of the meter and hold it at the subject's position, facing the main light source. It is essential to hold the meter as the subject would be positioned—pointing it directly at the key light. For example, if you are photographing a model facing a window, you would stand where the model's head is, hold the meter out at arm's length, and point the dome toward the window. The Sekonic will then display the exact shutter speed or f-stop required for a correct exposure based on the film speed you entered. This method ensures that your subject is rendered with perfect middle gray, regardless of the background.
Working with Continuous and Flash Lighting
One of the significant advantages of using a Sekonic meter is its versatility with both ambient (continuous) light and electronic flash. For daylight or studio strobes, you simply hold the meter in place and take the reading. When working with flash, however, the process requires a quick trigger of the flash head to sample the light. Many photographers trip the flash using a test button on the strobe or a remote trigger connected to the meter's sync cable. As soon as the flash fires, the meter captures the intensity and calculates the correct settings. This workflow is significantly faster and more reliable than relying on a camera's test shots, especially in a studio environment with multiple lights.
Applying the Readings to Your Camera
Once you have obtained a reading from your Sekonic meter, the final step is to transfer that information to your camera. Sekonic meters display the recommended shutter speed and f-stop combination on an LCD screen. You will need to manually input these settings into your camera's manual mode. If you metered for an aperture of f/8 and the meter suggests a shutter speed of 1/125th of a second, you would set your camera to those exact settings. This manual transfer guarantees that the light you measured is exactly the light captured on the sensor, creating a direct link between your creative vision and the final image.
