Techniques and Process 1B – Task 1 – Measuring and Using Flash

The aim of this task was to use speed lights to improve light levels.

I had to set both my camera and flash to Manuel (M), then set my shutter speed to 1/125, then set my flash to full power; displayed as 1/1
Once my camera and flash were set up i then had to measure the distance from my flashgun to my subject – 10ft with my flash pointing straight at my subject.
In order to figure out the measurements i had to divide the flash’s guide number by the flash-to-subject distance which will give me the working aperture.

I set up my camera and flash, and then measured 10ft from my flash to the subject. I then had my model hold the light meter and set it off i then fired the flash on pilot and measured the light metre again.
(flash gun settings, M 1/1, ISO 100, 50mm )

Measuring Light

x the aperture of light meter by the distance
5.6.8 x 10 = (not a full number so rounded to) 58
58 = guide number

Divide the guide number by the distance. (to get exposure)
58 divide 5(ft) = 11.6 (aperture)
58 divide 15 = 3.84 (aperture closest to 4 – wide angle)


Shot on F11
Shot on F11
Shot on F13  (F11 1/3)
Shot on F13
(F11 1/3)
Shot on F14 (F11 2/3)
Shot on F14
(F11 2/3)






Overall i found measuring the flash quite simple. In the above images i calculated the exposure over 3 apertures as i found the first to images to be slightly too bright. F14 (F11 2/3) was the best light source at a distance of 5ft, as it isn’t as harsh on the skin tone and adds a softer feel.
At F4 i struggled however because of my lens length, however with the image cropped down and zoomed in you can see that the light is over exposed and is also bouncing/shining off the white door frame. It is ahrsh on the skin and not flattering.

Shot on F4 Wide Angle
Shot on F4
Wide Angle
Cropped closer
Cropped closer







Bouncing Light

In order to bounce light off of somewhere you must work out the measurement of the flash to the surface to the subject.
I stood in a corridor about 5ft away from each other.

Shot on F14 (F11 2/3) 5Ft
Shot on F14
(F11 2/3) 5Ft
Shot on F14 (F11 2/3) 5Ft
Shot on F14
(F11 2/3) 5Ft








I used the same calculations as before, The first image is slightly flat which adds a harsh tone towards the skin as the flash is face on. Also due to the flash been face on shadows are harsh therefore i decided to move my flash and bounce the light off of the ceiling to see if it added a softer tone towards the skin.

Shot on F7.4 (F5.6 2/3) 10Ft
Shot on F7.4
(F5.6 2/3) 10Ft







Bouncing the light off of the cileing added a softer tone of light towards the model, the light hitting her is not as harsh and her skin tone does not look as bleached out. Overall i like the affect that bouncing off light has and want to experiment further by using deflectors.


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Olivia Bates

My aim is to delve in to the alliance between fashion and people so I can explore the link between the subjects in order to communicate my image I have the ability to approach any difficult situation and solve any problems to find resolutions in order to work efficiently. I can manage situations, communicate honestly and have a trustworthy manner as I am expressive and take no nonsense which allows me to get the job done. Please contact me at; and visit my website;

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