If you want to take visually good photo, you need to understand exposure first. It’s all about the relationship between shutter speed, aperture, and ISO to expose the image properly. Not too dark, not too bright.

What is Exposure in Photography?

In simple words, exposure refers to how an image is recorded by camera sensor and how much light is captured so that all possible details are recorded. Though it might be confusing for beginners in initial stage but it’s important to understand. As only these factor makes sure your image is properly exposed.

Getting the right exposure is the first step in photography!

Understanding the Exposure Triangle

Exposure in photography is all about light, and the process of controlling how much light hits the digital sensor in your camera to produce an image. Exposure consist of three three main ingredients or elements that determine the exposure of a photography – Aperture, Shutter Speed and ISO. hey work together to produce a photo that is properly exposed.

One must learn how to balance all these three elements to achieve desired. If you change one among them as per your wish then you have to change at-least one more to maintain the correct exposure.

So, the three elements (ISO, Aperture and Shutter) are known as the “exposure triangle”. And if you know how to control or adjust these elements, getting a properly exposed image would not be a problem. Though you have to compromise one element to get the other one as per your wish.

Let’s understand these three elements in short

1. Shutter Speed

In simple words its the speed of your shutter(or mirror) which is placed in front of your sensor. The more time it opens the more light falls on your sensor. And makes the image brighter. And the shorter time it remains open lesser light falls on the image.

But it affects overall photo in other way too. Faster the shutter, freezes the subject. Slower the shutter more is the chances of shake.

2. Aperture

Aperture is the size of hole (lens iris) inside the lens through which light passes till the sensor.

Bigger the opening of this hole, more light reaches the sensor and smaller the hole means less light reaches the sensor.

Though this element is a bit confusing as behaves inversely to its number. f/1.4 is the bigger hole and as we go towards f/32 it starts getting smaller.

3. ISO

ISO is the sensitivity level of the sensor. Means, we can increase the sensitivity of our sensor to record more light then the one which reaches the sensor.

So when we fell short of light event after adjusting Aperture and Shutter based on our need. We can increase the sensitivity of our sensor by increasing the ISO.

But this also comes with a drawback, higher the ISO more the noise. And more the noise, lesser the quality of our image. Though this depends on the sensor of your camera model.


So we learned about the three factors which affect your image. Though we will learn more in depth in upcoming tutorials. Like what settings is recommended and how they can affect your images under different circumstance. In case you have doubt in these three you can revert back in email or through DM on social media platforms.