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Photography with Flash

Photography with Flash. Module A Types Features Control Sync speed Dual Lighting ----------------------------- Presented by: Lester Parkes LPSNZ New Brighton Photographic Club www.newbrightonphotoclub.org.nz. Flash light: Types & specs. On-camera “pop-up” or off-camera unit.

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Photography with Flash

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  1. Photography with Flash Module A Types Features Control Sync speed Dual Lighting ----------------------------- Presented by: Lester Parkes LPSNZ New Brighton Photographic Club www.newbrightonphotoclub.org.nz

  2. Flash light: Types & specs • On-camera “pop-up” or off-camera unit. • Small & convenient package • Very fast pulse of light Ex: Nikon SB800 ~ 1/1,100 – 1/2,700 sec)

  3. Flash light: Types & specs continued … • Directional light pattern - “harsh light” with shadows (use a diffuser or bounce off walls/ceiling) • Power rating indicated by Guide Number (GN) - Calculation: GN = D x Ap (Ex: Nikon SB800 has GN = 38 @ ISO100, 35mm zoom) • Level control: Automatic or manual - In both cases, amount of light determined by flash duration

  4. Flash light: Camera ‘sync speed’ • ‘Sync speed’ is the fastest shutter speed that allows full illumination by flash • Try this: 1. Turn flash ‘off’ 2. Set camera to ‘Manual’ mode with shutter at 1/1000sec 3. Turn flash ‘on’ 4. Note change in shutter speed The new shutter speed is the camera’s ‘sync speed’. • Typical sync speeds: 1/160s, 1/250s, 1/300s (depends on camera brand)

  5. Flash light: Control of exposure • Flash is typically used to illuminate a foreground subject • Controlling foreground illumination with flash: • Duration of the flash pulse • Camera: ISO and Aperture • Subject distance • Note: Shutter speed is not included • Key point: • Shutter speeds slower than the sync speed do not affect exposure of foreground by flash Very short flash duration Slow Shutter speed Compared to flash duration Shutter > Sync speed

  6. Flash light: Dual lighting • A shutter speed slower than the sync speed … - does not affect flash exposure - allows background light to take part in the photograph • Dual lighting situation: (1) Flash for foreground and (2) Ambient light for background • Setting the shutter speed longer than the ‘sync speed’ is called ‘dragging the shutter’ • Method(refer to photo on next page): 1. Set camera to ‘Manual’ 2. Adjust exposure for background (Aperture, Shutter speed, ISO) (make sure shutter speed is slower than the sync speed eg 1/100s, 1/60s etc) 3. Set Flash to ‘Manual’ 4. Adjust flash level for foreground exposure (Taking these photographs in dim light conditions favours a slower shutter speed Ex: sunrise, sunset)

  7. Example of dual lighting: Background (sunset) and Foreground (Flash)

  8. More information … http://strobist.blogspot.com Select “Lighting 101” for 29 tutorials covering all aspects of photography with flash (equipment, connections, lighting techniques) http://neilvn.com/tangents/flash-photography-techniques/ 15 articles about flash photography techniques (with lots of example photos)

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