Vital Traingle of Photography

If u are a beginner with a DSLR, it can be quiet overwhelming.

Camera at first was very complicated to me. I had to take tons of images to actually figure out what is going wrong. With umpteen trials and errors, I could figure out what worked well for me to take breath-taking images.

This basic guide to photography will surely make you a champ in photography by avoiding mistakes I committed. So. Lets begin with basic aspects of any Camera.


For the beginners in photography, exposure is an important key to capture an awesome image.

If you learn how exposure works, it will help you to take charge of your camera and take better pictures. The three important elements that contribute to a perfect exposure are Shutter speedaperture and ISO .

As you’ll soon learn, these elements have an effect on more than the exposure. They also cause alterations in depth of fieldmotion blur, and digital noise.The thorough understanding of how each one works, will help you start diving into manual mode. From here on the control of your camera will rest with you.

To remember the three settings easily, Exposure triangle will definitely be of a great help. All three working together, control the amount of light captured from any given point.

This helps us to understand, that if one parameter is changed, the others too will get affected and have to be changed accordingly if we are shooting the same object in the same given conditions with the same amount of light. Let’s look at each one of them:

1. Aperture

Aperture is basically an opening on your lens that will allow the light to pass into your camera.

It is measured in F-stops.

Basically, it is similar to the Pupil of our eyes. The more our pupil is open, the more light would enter our eyes, and vice versa.

Only thing to remember is, as F-stop number increases, the opening becomes smaller and less light enters the lens, similarly, as F-stop number reduces, more light passes through the lens.

The image below will help you understand the aperture (F-Stops) easily:

Image shows light entering at various F stops
This shows Shallow Depth of Field

2. Shutter Speed

Shutter speed is used to control the light that entered through lens by increasing or decreasing the speed at which the shutter will open/close. Something similar to blinking of our eyes, which blinks fast if there is too much of brightness…

Shutter speed will depend on what exactly you are shooting as different situations need different shutter speed depending on the availability of light. For E.g., If u need to shoot at night , shutter speed will be really slow (20 Seconds) while if you are shooting fast moving objects like a racing car , shutter speed would be really fast (1/2000)

So, knowing your shutter speed is really very important to shoot various kinds of objects.

Find this image to easily understand the effect of shutter speed on the final picture:

Effect of shutter speed on the object- Photo courtsey oberphotographytips.com
Example of slow shutter speed

3. ISO

ISO stands for the International Organization of Standardization. ISO is camera’s light sensitivity.

The aperture is the hole that lets light enters into your camera through apertures.

The timing of light entering and hitting the sensor is controlled by Shutter speed, and how sensitive is the sensor to that light is determined by ISO.

As the ISO number increases, the brightness increases but the images become grainy, i.e. the image quality decreases due to lot of noise.

Effect of ISO on the image


So This is all about Exposure, but if understood properly, it will help you take your pictures to the next level… Point to note is that each of these three things are inter dependent ,so much so that if one is changed there has to be a same amount of change in another for a great exposure.

I know, I know, all this is a little over-whelming, and technical….But to make it a little simpler for you, check out the cheat sheet given below, it will help you take pictures with correct exposure, of course with lot of practise…Happy Learning!!!!!

Image courtsey-mommattography.com

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