using flash in digital photography

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Post on 05-Dec-2014



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Using Flash in digital photography, on camera bounce flash, video light, off camera flash, strobist flash,


  • 1. The use ofFlash inPhotographyBy Chris TimothyImage by Patrick Hoelck
  • 2. The use ofFlash inPhotography1. Introduction Purpose and considerations2. On Camera Bounce Flash3. Strobist Flash4. Video Lighting
  • 3. Introduction- PurposeUsing Flash is key to controlling and manipulating lightwhen available light is not the appropriate for the shotyou hope to capture. Flash gets given a bad name byphotographers using inbuilt factory camera ash. Youhave no control over the direction of the that type ofash. It can only come from one angle and height andusually hits the subject square on. The visual effect looksat and lacks dimension and interaction betweenhighlights and shadows. As photographers were alwayslooking for perfect light and yet, the quality of availablelight isnt always ideal. But if you use ash wisely, youare able to enhance or over-ride the available light in alocation you wish to shoot in. With careful andconsidered use of ash, you are more in control of light,and hence the way your photos will look than if youjust accept the ambient light. the existing ambient light.
  • 4. Introduction- PurposeHaving the ash come from a differentdirection to that of the camera addsreal depth and interaction of highlightsand lows lights thus a nicer contrast.Flash can delete an unwanted lightenvironment and add mood, emotionand connotations to your work.Here Patrick Hoelcks Flash has addeda nice gradient between the highlightsand the shadows and also a naturalvignette on the background. In additionto this it also acts as a key light to thesecondary light, the window. It solvesthe problem of silhouetting. Flash caninteract with as well as concur naturallight.
  • 5. Directional Flash by Patrick Hoelck
  • 6. In built straight on Flash
  • 7. Introduction Considerations Camera Tech/SettingsTo use Flash to its potential you have to consider your camera settings to ensure youcorrectly expose. There is no specic equation to ensure you do this correctly. However youdo need to analyse the lighting situation that you are in and consider what effect the ashwill have on it and ensure you leave room for it in your settings. For example deliberatelyunder exposing to leave room for the ash to enter the shot. Without ash With Flash 1/160 @ f3.2 @ 800 ISO 1/160 @ f3.2 @ 800 ISO with ash
  • 8. Considerations. Exposure.Using the Light Meter In digital SLR photography its important to understand what the light meter isand what it does before discussing how to use the cameras built-in meter to setand manipulate exposure and in this case use it to helps allow for ash.The built-in light meter found in your digital SLR camera measures the amountof light being reected off objects through the lens and into the camera.This measurement is then used by the cameras computer to determine what itbelieves to be the best exposure for the scene, with that exposure being theproper combination of shutter speed and aperture and ISO. Here is a DSLR in built, on screen light meter. It is measured in stops. The image of the light meter says your exposure settings are correct. A -1 = under exposed,+1 = over exposed.
  • 9. Using the Histogram When we use Flash there is a danger we will wash out detail in anything which isalready bright/reective. For example a white dress or the sky. The screen on DSLRcameras are relatively small and it is difcult to check if a small areas has lost detail or isbleached out. You could use digital zoom on play mode to check. However this is timeconsuming. Another way to check is to use the histogram to analyse your exposureresults.
  • 10. Using the Histogram A Histogram covers the Dynamic Range of color/tone from black to mid tones towhite. Dynamic range in photography describes the ratio between the maximum andminimum measurable light intensities.
  • 11. Using the Histogram As long as the data in your graph nishes before the edge of the graph you are ok. Ifthe data falls off the graph you have either over or under exposed.
  • 12. Using the Histogram Under or over exposed? So, when shooting with ash always check you histogram graph to ensure your shot is not under or over exposed. If you dont you will probably loose detail in the high lights or shadows.
  • 13. Using the Histogram Correctly Exposed
  • 14. The Catch LightTo learn how to use Flash it is always useful to analyse other peoples ash work. There is areally helpful clue to analysing where they have positioned or bounced their ash and it iscalled a Catch light. A catch light is a small white circle in the subjects eye which tells uswhere the ash was positioned in the shot.
  • 15. The Freeman Light PortraitsDean Catch Celebrity
  • 16. On camera bounce ash Image by Tom Munro
  • 17. On camera bounce ashOn camera bounce ash is a way of controlling your light. It turns being onlocation into a studio. The techniques requires the photographer to re theash at/on somewhere which reects. You re the ash where you would like astudio light positioned. Window Subject Camera/Flash Firing the ash
  • 18. Blocking Direct FlashIt is important when using this technique you block any ash from hiDng your subject directly. You do this with various pieces of equipment but you could use a black piece of foam or even your hand. This technique allowed the photographer to bounce the ash to his leJ creaKng soJer light than a direct ash. The direcKon of the ash is well composed as the subjects take on a higher saturaKon than that of the locaKon.
  • 19. Here the Photographer has used the 70-200mm lens, a f2.8 wide open aperture and then simply has to wait for the right expression. He is posiKoned so that there are defocused highlights in the background to help create separaKon. The ash is bounced o to the right into the large recepKon room. Result- slight contrast, well lit shot.
  • 20. Still life and T.T.Lcamera settings: 1/80 @ f4 @ 1600ISO; TTL bounce ash. The Flash is shot to the left, reectsback and makes a nice combination oftones, again nice interaction betweenthe highlights and shadows. All thesame is not aesthetically pleasing.What is TTL?TTL is a AUTO for ash, it stands forthrough the lens. It looks through thelens and judges the light that is enteringthe camera and powers the ash levelsaccordingly.
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