The intensity of light from a flash is usually influenced by the duration of the flash, the longer the duration the stronger the flash, and vice versa. By using false, you can capture moments that are sometimes not visible to the naked eye. You can lower the flash output to reduce the flash duration to the shortest, just a few hundred microseconds. To capture the shape of the object clearly, make sure your focus is correct by using a stop down aperture.
Well, the problem is that sometimes reducing the flash output makes your photos less bright. If this happens, you can increase the ISO instead of increasing the flash output. The advantage is that with a dark background, you can provide higher contrast to your subject.
EOS 60D/ EF-S18-55mm f/3.5-5.6 IS II/ Manual exposure (200 sec., f/14)/ ISO 400/ WB: Auto/ Flash: SPEEDLITE 430EX II (Manual, 1/64)
Source : https://snapshot.canon-asia.com/
To get these photos, these are the shooting conditions.
All lights are turned off, there is a little light from the door to catch the subject. Because if it's completely dark, your camera can't detect your subject. Camera stand-by on tripod.
Source : https://snapshot.canon-asia.com/
Source : https://snapshot.canon-asia.com/
A: Off-camera Shoe Cord
B: Approx 0.6m
C: Approx 0.4m
Steps:
- The background cloth you use must be a material that prevents reflection of flash light.
- Set the focus first using manual focus and set it at 1 point.
Source : https://snapshot.canon-asia.com/
3. Release the shutter at the right time, according to the timing of the subject.
Things you need to remember:
Flash is different from sunlight. The flash light will only light up according to the specified time, whereas if you are in a completely dark room, the subject will not receive light even if the shutter speed you use is long. For example, if you set the shutter speed to 10 minutes in a completely dark room, the exposure process only occurs when the flash is fired (there is light). So the subject's movement can only be captured according to the flash duration regardless of the shutter speed setting. The greater the flash duration, the longer the exposure time, so the risk of blur will be greater. Meanwhile, with a small flash output, the exposure time is short, and the risk of blur will be reduced.
