Flash tests

 

 

Flash tests

 

We were asked to test some flash styles with a Speedlight both on camera and off camera so myself and one of my peers went out around the college to take some shots below is the equipment used.

 

Nikon D800

Nikon 24-70 f 2.8

Yongnuo YN568EX

SanDisk extreme pro

Yongnuo flash triggers YN-622N

 

The different settings that can be harnessed on a flashgun are explained below

 

iTTL – it uses a low powered pre flash from the flash before the mirror is raised using the inbuilt RGB meter preflash occurs when the lens aperture is wide open , preflash calculation sets the power level of the flash to correctly expose the image with the desired settings such as aperture, ISO and shutter speed all in mind.

 

M- manual control mode is as it sounds you can control the power output of a flash and this is displayed in a fraction so full power is 1/1 half power by a stop is ¼ and so on and so forth all the way down to 1/128 now obviously when using manual flash mode you have to compensate with the camera setting exactly how much light will be added via the flash

 

One thing to bear in mind is max flash sync speed its not possibly to use on camera flash as standard at all shutter speeds for example the flash gun on my camera it will allow for a shutter speed of 1/320th

 

Below is a shot taken with the flash in iTTL mode

1

exif: 1/320 f7.1 ISO 100

 

This was shot with direct flash (pointing directly at the subject) it tends to be quite harsh and can give harsh shadow cast on the background if it is too close to the subject below is another example of direct flash

2

exif data: 1/320 f 7.1 ISO 100

3

exif data: 1/320 f 7.1 ISO 100

 

 

next I shot from the same position with the flash head facing upwards to use the bounce of the white ceiling you notice that it gives a slight shadow cast on the face below the nose and below the chin and eyes as shown below

4

Exif data: 1/320 f 7.1 ISO 100

 

The next image was using the built in diffuser and white card camera was in portrait and the flash was facing to the left the white card one thing to remember about flash is that light is directional and can be manipulated to your needs you just need the tools as shown below

5

exif data: 1/320 f 7.1 ISO 100

 

 

Flash can be used outdoors to even out ambient exposure values to increase the dynamic range of an image. For instance everyone has taken a snapshot where the sun is behind the subject and the shade is over the face the flash gun can cancel out the shade on the face as shown below

6

Exif data: 1/320 f5.6 ISO 100

7

exif data: 1/320 f 5.6 ISO 100

 

Overleaf is an example of a shot I took on location that shows how harsh shadows can be created from bright overhead midday sun. The image shows a harsh shadow from the models right hand side of the face this would have been solved with a flash gun off to camera left on a stand used as a fill light to decrease the harshness of the shadow

8

Exif: iso 100 f6.3 1/2500th

I  feel that off camera flash is a massive benefit and understanding flash and light in general can be a huge benefit as an artist and as a photographer. i will be making use of flash both off camera and on camera when the time is needed i think to be adept in the field of photography you must understand when flash use is a necessity and when it isn’t needed. i plan to do a child portraiture shoot in the middle of the day that i will most certainly need flash as i would want to reduce any harsh shadows on the face or anywhere else.

 

until next time

 

PJ x

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