Aperture is just like human eyes. It has an important role on camera that controls the amount of light. Aperture is calibrated in f/stops and is written as numbers, for instance f/1.4, f/2, f/2.8, f/4, f/5.6, f/8, f/11 and f16. The role of aperture is to open a lens and allow light to pass. Remember that, the numbers work differently. Lower f/stops requires more exposure as they represent the larger apertures, whilst the higher f/stops requires less exposure since they represent smaller apertures. It makes you feel confused in the beginning stage but you will get used to it. In practice, many photographers prefer to use the narrow aperture due to the sharpness. Sometimes, when you take a portrait image you don’t need the background, then in this case the wide aperture is better. When you first buy a DSLR camera, make sure to check your manual first and foremost to learn how to set Aperture Priority It may take a while until you feel comfortable to using it.
Aperture & Shutter Speed
What is shutter speed? Simply saying, Shutter Speed is the amount of time the lens is exposed to light. As mentioned earlier, a low f/stop (small aperture) requires more light hence the shutter doesn’t need to stay open as long to make a correct exposure which translates into a faster shutter speed. Vice versa, a high f/stop requires less light hence the shutter has to stay open a bit longer which translates into a slower shutter speed.
Aperture & Depth of Field
What is “Depth of Field”? Why do we have to know “Depth of Field” when we study Aperture? Understanding the concept of “Depth of Field” is important because the degree of aperture affects the sharpness of the image. In other words, aperture make the images how sharp or blurry is the area behind the object.
The wider the f/stop (f/1.4)——the small depth of field—the blurrier the background
The narrower the f/stop(f/16)——the larger the depth of field—the sharper the background
Where to Find Aperture on Camera
When you look at your camera lens carefully you can find the number. Every lens has a maximum aperture and some zoom lenses will use different numbers such as f/3.5-5.6 on the lens barrel. These numbers are referring to the maximum aperture, some lenses can maintain the largest aperture throughout the entire zoom range, therefore only one number is used.
Tips How to Choose Right Aperture
How to determine the choices we make in selecting the aperture? In fact, there is no rules but there are helpful guidelines for choosing right aperture. Different aperture is recommend for different subjects you want to shoot.
Aperture for Portraits
To get the best short for portrait images, using a lower aperture (f2.8) is recommended that creates very shallow depth of field , blurs behind the subject. Especially, this technique is used for shooting newborn babies.
Aperture for Nature/Landscape Photography
Are you thinking to be a landscape photographer? Then choose a small aperture (f/8 or f/11) that allows you to see as much detail as possible in the front and background of the image.