RostrioA flash is a device that emits a short, intense burst of light. Photographers use a flash when there is not enough natural light or artificial light to properly expose a photo.
By using a flash, sufficient light reaches the film or image sensor, allowing a well-exposed photo to be taken.
A flash can be a separate device, but is also built into some cameras.
Types of Flashes
Types of flashes:
- Fill-Flash: Reduces high contrast to a desired level, with the surrounding light being the primary source and the flash light being the secondary source.
- Automatic Flash: Allows the camera to determine whether there is enough available light to use a flash.
- Red-Eye Reduction: Emits a series of low-intensity flashes to make the pupils contract before the main flash goes off, reducing the chance of red-eye.
- Slow Sync Flash: Combines automatic flash with a longer shutter speed to properly expose both the subject and the background.
- External Flash: Connects an external system flash or slave flash to the camera.
- Ring Flash: A circular flash that is attached around the camera lens.
- Bounce Flash: Directing the flash toward a ceiling or wall to obtain a more even lighting.
Using a Flash When Taking a Passport Photo
The government has set requirements for the lighting in passport photos. The lighting must be even, both on your face and on the background. Overexposure, underexposure, and reflection should be avoided.
Using a flash is allowed, but there should be no white spots on the face caused by the flash or artificial light in the photo. The flash should be used properly to ensure that the photo is well-lit and properly exposed.