The recent popularity of off-camera flash is largely due to the introduction of radio transmitters. Previously, photographers were constrained to using flash sync cables or, if fortunate, optical sync. Without a radio transmitter, adjusting flash settings off-camera was quite cumbersome. Thankfully, technological advancements have resolved these issues.
Off-camera flash, as the name suggests, is a flash unit that operates independently of your camera, typically controlled by a radio transmitter. Usually, these transmitters are brand-specific, meaning you’ll need a transmitter that matches the brand of your flash.
There are several benefits to using off-camera flash. The primary advantage is the ability to separate the flash from your shooting location. This separation ensures consistent lighting power, as the flash’s position relative to the subject remains unchanged, regardless of your movements. This consistency results in more uniform lighting and greater creative freedom for the photographer.
Further exploring the benefits, when you position the flash on a light stand at a certain distance from the subject, you are able to control the lighting intensity more effectively. This control is dictated by the inverse square law, which states that the intensity of light decreases with the square of the distance from the source. Understanding this law allows for precise control of light power, making flash photography simpler and more versatile. You can position the flash optimally for each shot, without worrying about your position or lens choice.
Modern off-camera flash technology even includes high-powered, battery-operated strobes. I’ve used two 600 watt strobes on stands, directed upwards and outwards, to fill a church with soft ambient light during a wedding reception. The strobes were controlled by an on-camera Canon 600EX II-RT, which added highlights, resulting in studio-quality lighting wherever desired.
Final thoughts
Off-camera flash is an incredible tool that allows for nuanced light shaping, a task that’s far more challenging with an on-camera flash. If you haven’t already, consider incorporating off-camera flash into your photography toolkit. Feel free to share any questions or comments below. Good luck!
