Mixed Light Sources


Canon 5D camera and Canon 24mm f1.4 L series Lens Exposure Details: 2.5 seconds @ f3.5 ISO 400                              Canon 5D camera and Canon 24mm f1.4 L series Aspherical lens                              Exposure Details: 2.5 seconds @ f3.5 ISO 400

I hope you like this shot. I certainly had fun making it. It was well after sunset on a very cold evening near Harcourt in Central Victoria. I had just finished day one of a two-day workshop in the area and, prior to heading back to base for a well earned dinner, I decided to introduce the group to the notion of shooting under mixed light sources.

The exposure required to make this image was 2.5 seconds. I used a tripod to eliminate camera movement. The 24mm lens provided a sufficiently large Depth Of Field (DOF), even at f3.5. The trees in the background are sharp, the clouds are not because they are moving during the long exposure.

I then introduced a portable flash unit, held just to the left of the camera and angled across the subjects face. The resulting shadow emphasises the shape of the subjects face. The advantage of the flash under these circumstances is twofold: the extra light can help place emphasis on the subject and the speed at which the flash fires (often between 1/4000 and 1/10,000 of a second) can help maintain sharpness, despite the relatively long exposure.

It's great how a technique like this can, despite a long day's shooting, re-invigorate participants with a new sense of energy and positive attitude. The lesson for participant and facilitator alike is that fun enhances learning.

Basic image processing of the original RAW image was conducted in Adobe Lightroom. Adobe Photoshop CS3 was employed for further (subtle) enhancements and, via a Black and White Adjustment Layer, to produce this warm toned black-and-white rendering of the image.

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Glenn Guy, Blue Sky Photography 
Glenn Guy