LIGHT (Natural)
Here we are again, week number three and Photography Tips 3 is here with us. Have you, like me, taken your photos and not looked at the monitor at the rear of the camera until much later, only to find that they were very dark or dark in areas? This image is a typical example of what happens when we aren't paying special attention to the available light.
You too? Phew, there I was thinking that I was the only one that ever did that!
Picking lighting conditions can be a fairly stressful task, especially when you are trying hard to get the image right in the print and yet the camera is telling you one thing in the viewfinder but the monitor is telling you another. The quality of the light falling onto your subject can be either hard or soft and is best determined by either the direction of the sun or objects casting diffusion (e.g., clouds) or shadows, as these will contribute to the strength of lines and patterns, as well as the overall contrast - among other things.
One great way of achieving some understanding of the changes in the light on an image would be to set out by taking a succession of photographs at regular intervals leaving your camera set on a tripod and focussed on your subject. Try this simple exercise on a clear of cloudy day (try both to get a better understanding of how light can be easily diffused on an overcast day). monitor and analyse your findings to see how shadows from directional sunlight can change colour and darkness on your image, or by seeing the varying contracts on the overcast shots.
Photographs taken with mixed lighting or containing mixed lighting will always show differences in the finished colour of the image, this can sometimes be compensated when using Auto White Balance (AWB). It may be that a number of shots are needed taking on board the different light mixtures (Daylight, Tungsten, Fluorescent, street lights, etc.
Other issues can occur when photographing people, still life, and some colour-sensitive subjects with the mixture of lighting as above, or indeed in strong, natural lighting. This can be rather evident when taking photography of areas such as meadows where sunlit grass and the surrounding greenery of shrubs and bushes, etc., or when taken close up portraits of subjects with sunlit greenery.
One very good resolution to tackling this kind of situation would be to use the Auto Exposure Bracketing (AEB) mode on your camera. This takes a series of shots that are Under-exposed, Correct- exposed, and Over-exposed, allowing you to manipulate the images by layering them in post production software such as Photoshop or CorelDraw. The following three images is an example of how AEB is used.

There are a number of other elements of light that can have dramatic effects on the finished image, such as, tonal interchange (differences between objects in the picture, such as with portraits). This could be the difference between the direction of the natural or artificial light that shows in the lightest side of the subject and the darkest side and vice-versa; time of day as noted above; superimposed exposures, simply put by the use of more than one image and manipulating an image by using them on the same layer in Photoshop for example, and others. It is important to study your camera's manual and play with the different mode settings that would be able to change the effect of light in your image - and yes, this does also include Aperture, Shutter Speed, White Balance, ISO, etc.
I think you get the picture (excuse the pun)! Photography is not an easy hobby or interest, or indeed business, but it is very interesting and really does exercise that grey matter we contain between those ears of ours.
Next week's blog will be looking at Artificial light - that is the use of studio lighting and flash photography.
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Images, courtesy of Google Images.