Flash Photography Basic Concepts

• Every flash photograph is two exposures in one.
• Fill flash can be used when subject is backlit or sidelit to eliminate silhouettes or shadows.
• Flash exposure is not affected by shutter speed.
• Flash Illumination is dramatically affected by distance
• Your camera measures ambient light and flash illumination separately
• With automatic flash metering, the flash illumination is measured after the shutter button is pressed, and the flash output is adjusted accordingly.
• Every SLR camera with a mechanical shutter box has a maximum sync shutter speed.
• Harsh lighting, washed out subjects and red eye can be eliminated by using diffusers and light bouncing.
• It is possible to change the order if when the flash fires using "Rear Curtain Sync".
• Removing the flash from the top of the camera helps eliminate red eye and unflattering shadows.