Aperture And It’s Role In Photography

25 / 05 / 2017

Aperture And It’s Role In Photography

Aperture or F/Stop is a hole of variable size inside a camera lens.It is one part of Exposure triangle.The size of aperture controls the brightness of light reaching the film/Sensor. To put it into a very simple language you can compare Aperture to the pupil of human eye.Pupil which is a hole that lets the light pass further into the eye. Aperture either adds a dimension to a photograph by blurring the background,or brings everything in focus. 


Size Of Aperture-Large And Small Aperture

Size Of Aperture-Large And Small Aperture

We can consider the iris of human eye that controls the size (Diameter) of the aperture is called “diaphragm” in optics.Purpose of diaphragm is to block or stop all light,with the exception of the light that goes through the aperture.Aperture is known as f-number (for example f/5.6).These f-number that are also known as “f-stops” are a way of describing the size of the Aperure. A Small f-stop means a larger aperture,while a larger f-stop means a smaller aperture.A large aperture (For Ex-f/1.8) allows plenty of light to reach the sensor and a small aperture (for ex-f/22) allows less amount of light to reach the sensor.


The term stop down means reducing the aperture.

Small opening of the hole will give you large Depth of field and large opening of the hole will give you small depth of field .Depth of field refers to Range of Crisp focus in an entire frame.We would be sharing an entire blog on Depth of Field (DOF) very soon.

Large Opening = f/5.6 or below

Small Opening = f/7.1,f/8,f/9,f/10,f/11,f/16/f/18,f/22                              

Wide Aperture = Narrow Depth of Field

Small Aperture=Large Depth Of Field

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