Posted on Apr 30, 2009 | Comments 0
Exposure and aperture are important aspects of digital photography technique which most photographers take for granted.
Some of the many effects of wrong exposure and aperture are scene icons.
Scene icons are a major problem of digital photography which could be dealt with effectively through understanding the importance of exposure and aperture in digital photography.
Most digital cameras come with semi automatic exposure accessory which makes it easy for photographers to take creative control of the photography process.
It is important for novice photographers to fully understand exposure and aperture before trying advanced photographic tricks, because it’s easy to get confused by all the complicated exposure settings.
The first step in your journey is to master the aperture. Most digital cameras have an aperture (Av) option which is the opposite of semi automatic and programmed scene modes.
With the Av option you can learn more about aperture because you get to select your own lens aperture which suits your needs. The camera still sets the shutter speed for itself.
Most people have the misconception that aperture is only about limiting the amount of light entering the camera. What most don’t understand is that the quality of the image varies with aperture used.
When the aperture is at maximum the quality is poor and the quality improves when the aperture is low and it then becomes poor when the aperture reaches a minimum.
Using a small aperture will affect the quality of your pictures because smaller apertures are prone to damage from diffraction on the edges of the blades.
The next step would be to understand the exposure settings on the digital camera. There are many exposure decisions that a photographer has to make, which all depend on the photographer’s creative needs. Some of the decisions include ISO, aperture and shutter speed.
The lens has a large part to play in determining the aperture and exposure so it is important to get a quality lens which will provide you with more variations in terms of depth of field with your camera and this is possible without affecting the quality of your pictures.
Aperture and exposure are important in dealing with diffractions, when you reduce the aperture you minimise the amount of diffraction of light rays passing through the lens.
Diffraction is particularly important when taking landscape photographs. For landscape photos the greater the depth of field the better because there is loss of image quality when the aperture is small.
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