Exercise 2.8 – Fill Flash

Brief: Flash isn’t just useful to illuminate a dark scene, but to bring out a foreground subject with a flash that is balanced with ambient light – be that sunlight or artificial light. You can see many examples of fill-flash in Martin Parr’s photographs at www.martinparr.com You can use an on-camera flash or an external flash for this exercise. Take a subject – a person for example – and frame them against the sky. Make sure the sky is either a cloudy sky or the most intensely blue portion of the sky – on the opposite side from the sun. Put your camera into Manual mode and activate the flash. Flash units usually give you different strengths of flash output: minimum, medium and maximum, for example. You may want to experiment with these later, but for now use medium. Take a photograph of the subject and review it. Is the person’s face too bright and over-exposed? Is the background sky too dark? Now balance these two elements. At slower shutter speeds the background will become lighter. At fast shutter speeds, the background will be progressively underexposed (darker). To change the illumination on the subject use a combination of flash output and aperture (f-stop) to darken (close aperture) or lighten (open aperture) the foreground subject. The balance is achieved because the flash will illuminate the f/g subject by the same amount whatever the shutter speed. But the shutter speed will change the b/g.When you have a balance you like between the subject and the background, take a short series of pictures varying your position from close to distant. You’ll need to make adjustments to the aperture or flash output strength when you change the distance between you and the subject due to light fall-off.

This has not been easy for me to do for a couple of reasons. I don’t have any one to model for me, and I have not used flash before. It took several times of reading the brief, and my camera manual to understand how to use the flash. This is something that I will continue to practice.

The instructions in the brief are quite clear now that I have gone out to practice, but whilst doing so I found it tricky. I do find it awkward to ask people to model for me becuase of the anxiety that I experience, and I am not good at talking with people once I have asked them. Because of this I don’t think that I put people at ease. Maybe I am being a little hard on myself, there were some people who were easier to ask than others, and easier to talk to as well. In fact, those that agreed to have their portrait made are interested in my studies and become quite engaged. It wasn’t easy to remember whether I wanted to change the shutter speed or aperture or both, and whether I wanted to lighten or darken the background or the person. But its practice.

This gent was wonderful, relaxed, easy to talk with. I took a set of photos and we chatted for a while, he laughed, and this brought out the cheeky side to his character, so I re-shot him. He is my pick of the bunch.

This first series was practicing with changing the shutter speed to allow more background light in. I didn’t adjust the aperture because I wanted to see how shutter speed affects flash photography. The aperture was f7.1 for each photo, shutter speeds were 1/250, 1/125 and 1/80. These don’t work as photos, but if I had stepped down the aperture to f11 or slightly beyond then they would have been more correctly exposed.

 

The following were all 1/80 sec, and I changed the aperture so that it affected the amount of flash allowed through to the subject. By reducing the aperture size the background lighting is also reduced. The apertures were f11, f16 and f22.

 

This is the better photo. Better exposure, and more relaxed following the laughter. ISO 100, f22, 1/80.

Exercise 2.8 Fill Flash (22 of 29)

 

For the next series, the first three photos were all f6.3, and the shutter speeds were 1/25, 1/60 and 1/160.

In the following the shutter speed was 1/160, and the aperture was f9 and then f13. I prefer her smile on the first photo (below) when compared with the above, although the exposure for her face is better in the third photo above.  I think the first photo below would look good if I had shot it at f9 with a shutter speed of 1/100. All of the photos on this blog have been through Lightroom for camera and lens calibration and then exported to reduce size, with no further changes. I needed to explore and understand the effects of the technique rather than develop the photo.

 

Side lighting

One of the great benefits of fill flash is that you can reduce shadows and improve exposure, to gain a more balanced skin tone,when a person is lit from the side. For this set I adjusted the aperture and shutter speed to try to create balanced lighting. However, I didn’t account for the fact that a waiter was serving to the left of and behind me and this created different shadows in each photo. If I concentrate on the face then I am aware that although one side is more brightly lit, the shadow is reduced on the opposite side of his face when I have the exposure right. I am ignoring the middle photo with regard to balanced lighting on the face, as the shadow eliminates the side lighting. Data is:- f9 1/50, F9 1/100 and f13 1/100. The f13 in the third photo is better for the face, but the shutter speed could do with being a bit slower to lighten the background. The background is very distracting, however, he was sitting down having coffee with his wife, and I am very grateful that he allowed me to interrupt.

 

Back lighting

Having a subject back-lit can make it easy to create good subject exposure because the flash is the primary light source. That said, sun spot/flare and over exposed background then rear their ugly heads. For the next set I adjusted aperture and shutter speed to try to gain the correct exposure.  f11 1/250, f9 1/160, f7.1 1/160 (photo three would work better with a darker background i.e. f7.1 1/250).

Summary

From reviewing these photos, it is noticable that the background lighting is gradually increased or reduced with changes to the shutter speed. With the altered aperture the increase or reduction is more significant. I need to practice this exercise frequently until I become accustomed to changing both aperture and shutter speed so that I can alter the foreground and background lighting in a manner that is appropriate for the scene I want to shoot and the effects I want to create.

Exercise 1.12 Smash – Harold Edgerton – Attempt to Emulate Edgerton

Brief:- This exercise asks you to choose some suitable small objects that you can break! An old toy, some rotten fruit, a shirt or a balloon filled with water would all work well. The point here is to freeze a fast-moving object in an otherwise still location. You must get the object in sharp focus to reveal the detail of its disintegration and movement. Choose a suitable location where you won’t make too much mess. Aim to frame the object quite close, with the environment around it. You’ll need to frame the object in front of a background that helps to emphasise it visually: that could mean a complementary colour (e.g. red against green) or an opposite tone (light object against dark background or vice versa). Before you start, research the freeze-frame photographs of Denis Darzacq at http://www.denisdarzacq.com/ Do an online search for Harold Edgerton’s experiments. These photographers give you images that would be impossible without the mechanism of the shutter.

 

 

These notes are quite concise as I spent a lot of my time trying to photograph milk in the style of Edgerton.I say more about that at the end.

Electrical engineer, deep-sea and sonar photography, fast flash photography to capture balloons exploding and the bullet through the apple. Photographing and recording for nuclear testing. Photographic techniques have been a part of and an extension to his work

Milk Drop Coronet 1957 – high speed motion picture, then develop single image showing the coronet.

Milk drop coronet 1957Fig 1

Guisse Moran Tennis Serve 1952 – Multiflash – single negative, shutter fully open. Taken in pitch black. Strobe lighting. Film only exposed when strobe flashes.

Gussie Moran tennis serve 1952Fig 2

Atom Bomb explosion circa 1952 – Raptronic shutter. Shutter opened by magnetic field so the shutter could be open for a fraction of a second – down as low as 2 milliseconds

Atom bomb explosion circa 1952

Shadow Photography – No camera, no lens, just film, flash and fast-moving object. Flash is timed to fire just before the subject passes in front of the film. This way a bullet can even be filmed.

Stroboscopic photography – Electrical charge stored, discharged into inert gas tube for flash, flash then exposes the subject so rapidly that it can illuminate and freeze subject at high-speed, so running water would appear as drops of water.

Here are my attemptsExercise 1.12 SmashExercise 1.12 SmashExercise 1.12 Smash

I decided that I would try to capture a milk drop coronet. I have a Nikon d7100, Tamron 18-270mm lens at 270mm, and I attached the whole set of Vello Extension tubes, 36mm, 20mm and 12 mm – this gave me a focal length of 507mm (adjusted to include 1.5* built in crop sensor. I had the ISO at 8063 so the images have a lot of noise. I have done what I can to reduce it in Lightroom by using a combination of grad filter, eraser brush with auto mask to delete brush from the edges of the milk drops, then reduced clarity and increase noise slider. When I can afford better Lighting on external flash I will give this ago again. All are taken at 1/250th sec. I couldn’t go faster without underexposing and introducing more noise through development. Considering that Edgerton was using a high-speed motion camera which could record between 6,000 and 15,000 frames per second, then I think I have done well at 5 frames per second. It would have worked out better if I was using a pipette to drop milk or have someone else to do so, and I will also try the method that Edgerton did – having one drop of milk on a flat surface and dropping the next drop onto the milk on the flat surface. I have had a lot of fun today.

References

Fig 1 Edgerton, Harold; 1957; Milk Drop Coronet; Online at https://edgerton-digital-collections.org/

Fig 2 Edgerton, Harold; 1952; Gussie Moran Tennis Serve; Online at https://edgerton-digital-collections.org/techniques/multiflash

Fig 3 Edgerton, Harold; 1952; Atom Bomb Explosion; Online at https://edgerton-digital-collections.org/techniques/rapatronic-shutter

Sheldon, James; 1998; EXPLORING THE ART AND SCIENCE OF STOPPING TIME: A CD-ROM BASED ON THE LIFE AND WORK OF HAROLD E. EGDERTON; Cambridge; MIT Press; online at https://edgerton-digital-collections.org/