Aperture - Learn photography
Imagine in your mind, how the camera works. For you to make a good photograph, a certain amount of light needs to hit the sensor. Let us assume this amount of light to be hundred units. If the light hitting the sensor lesser than the amount of light required, the photographs will be dark or “underexposed”. Similarly, if the amount of light hitting the sensor is more than the amount of light required, the picture will be over-bright or “overexposed”.
There are two ways of controlling the amount of light hitting the sensor-via the aperture or with the shutter speed.
A lens with a "closed" aperture of f16 The aperture is nothing but the hole in the lens through which the light enters the camera. For the time being, all you need to know about the aperture is that smaller the number [1.4 or 1.8], the bigger the aperture and similarly, the larger the number will [16 or 22], the smaller the aperture or the size of the hole on the lens. All these numbers are often referred to by using the alphabet F in front of them. So 1.4 is referred to as F1 .4 and 16 is referenced to as F-16. This is just another way of trying to sound cool. There is actually no difference if you say 16 or F-16. Just remember, the smaller the number-the bigger the whole AND the bigger the number, the smaller the pool. This is all that you need to remember about the aperture. This will become second nature as time goes by but it is crucial that for the time being, you remembered this!!!