What Is Slow Sync Flash in Photography? How and When to Use It

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Flash: Irksome-Speed Sync

Utilize slow-speed sync with flash photography to capture more ambient light

Slow-speed sync allows a photographer to use wink at shutter speeds slower than the native sync speed of the camera. Native sync speeds are set at the factory and vary depending on the brand of camera you ain in addition to the model number of that camera. Sync speeds typically fall in the range of 1/60th to 1/250th. Check your photographic camera transmission to see your default sync speed. Depending on the speed at which your flash syncs, the camera will default to that speed when a flash is attached to the hot-shoe or popped up if the camera has born flash.

Flash: Slow-Speed Sync

Without wearisome sync flash, backgrounds go dark and give the impression that the subject floats in a sea of blackness. If the camera and flash sync at one/250th and you’re in an area that’s dimly lit, the flash will illuminate the subject in the foreground, merely the groundwork will be very dark. one/250th of a second is too fast a shutter to permit the low-level ambient light to build up on the sensor. The solution is to change the default sync setting to a slower shutter speed.

Flash: Slow-Speed Sync


Let’due south take a look at a given flash scenario: Y’all’re photographing in an environment that has warm ambient light. Y’all attach a flash because even though the light is warm, it’s not enough to illuminate your subject in the foreground. The camera fires at 1/250th because information technology’s the default. The event is a vivid subject but the warm ambient low-cal isn’t recorded. It comes out dark. Use Slow Sync to let the ambience light to be recorded on the sensor. Set the camera trunk or flash (it depends on the make as to whether deadening sync is found in camera or on board the flash) to a slow sync speed and identify the camera on a tripod or other stable surface. Take a meter reading in discontinuity priority or in manual. For the sake of instance, the meter reading based on the ISO y’all set and the aperture that’s currently dialed on the lens is 1/2 second. Because you fix your system to have the flash and shutter speed work in harmony in lowlight situations, the shutter will fire at ane/2 second instead of the default, which underexposed the background. The end upshot is that the main subject lit past flash is properly exposed and the background lit by ambient light accumulates on the sensor during the slow exposure. The shutter stays open long plenty to record both the ambience low-cal and the light from the flash—amazing. It’s essential to utilise a tripod with ho-hum shutter speeds and then the last image is sharp.

Flash: Slow-Speed Sync

To access ho-hum sync settings, there are many variables depending on the make of photographic camera you own. You need to reference your manual to see how your system works. On my Nikon D500, I utilize the post-obit path to admission slow sync: Menu>Custom Settings>Bracketing/Flash>Flash Shutter Speed. In that menu, I set it to 1/2 sec. This tells the photographic camera to record ambience light upwardly to and including i/2 2d. If I get into a situation where it’s darker and I need more time to allow light build on the sensor, I go dorsum into that setting and lower the speed to a slower fourth dimension. Chances are your digital SLR will have something similar. That being said, some cameras have a dedicated ho-hum sync setting that automatically tells the camera to use as slow a shutter speed as needed. Other systems crave y’all go into the Flash Menu and set it appropriately. I advise you put the time and effort into researching how to ready slow sync into your system as it will bring your wink photography to the next level.

Flash: Slow-Speed Sync

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Source: https://www.outdoorphotographer.com/tips-techniques/photo-tip-of-week/flash-slow-speed-sync/