The Exposure Triangle – a simple relation between : ‘ISO’, ‘Shutter Speed’ and ‘Aperture.’ This may sound like a complex term but it is extremely easy to understand. Read the previous post ‘T&P Tip #4‘ to see an introduction to the Exposure Triangle.
The combination of ISO, Shutter Speed and Aperture predominantly determines the way the final shot turns out. Let us quickly see what these terms mean.
ISO : In digital photography ISO measures the image sensor sensitivity. Lower the ISO value the less sensitive the camera is to light – means there is plenty of light in the surroundings. At the same time Higher the ISO value, more the sensor sensitivity. In low light conditions this causes images to turn grainy in texture.
Shutter Speed : This feature indicates the speed at which the shutter opens/closes. Measured from whole seconds to fraction of seconds. Most DSLR cameras will range from 30 secs to 1/4000 sec. At 30 seconds the shutter remains open for a long time thereby allowing light to fall on the sensor and capturing long light trails. At 1/4000 sec the shutter snaps open and shut at a very high speed there by capturing the image at very high speed and freezing motion.
Aperture : Aperture controls the amount of light that passes through the lens on to the sensor. By controlling the amount of light the degree of exposure can be controlled. At a higher aperture value (f 1.4; f 1.8; f 2.0) the aperture is wide open bringing out a lovely ‘Bokeh’ in the image by reducing the background to a buttery effect. At f 8; f 9; f 11 the image captures more depth in the image allowing a large amount of surrounding detail in the frame.
These three simple settings in your camera can help you elevate the quality of your pictures. Each of them are related to the other and play as variables in an equation that produces results to fascinate the eye.
Obvious questions here would be:
- How do I know what the settings are ?
- Where do I find them ?
- How do I change them ?
The answer to all of these and many more …. The M Mode.
Click here to get introduced to the M Mode of your camera.
Till then – Happy Shooting !!
all images belong to the author. njphotografy ©