Saturday, 11 February 2023

Photography- EXPOSURE TRIANGLE

 

What Is Photography?

Photography is the art of capturing light with a camera, usually via a digital sensor or film, to create an image.

The first permanent photograph was captured in 1826 (some sources say 1827) by Joseph Nicéphore Niépce in France.

BASIC CONCEPTS OF PHOTOGRAPHY

These are the main photography basics:

 

1.       Exposure

2.      Aperture

3.     Shutter speed

4.     ISO

5.     Exposure triangle

6.     Depth of field

7.     Focal length

8.     Sensor size

9.     Focus

10. Sharpness

11.   Camera settings

12.  Camera modes

13.  Metering modes

14.  Focus modes & areas

15.  White balance

16. Histogram

17.  Composition

18. Photography gear

19. Editing



EXPOSURE-THE MAIN ELEMENT OF PHOTOGRAPHY

 Exposure is the most important photography basic and the photography concept, exposure is depend on the amount of light collected by our camera.  

“Photography is painting with light”, Photography is about capturing light.  



 

The photography exposure basics are the apertureshutter speed, and ISO. The image should be correctly exposed, that is, with the perfect amount of brightness where you can see all the detail in the highlights and the shadows.


 

 


1.APERTURE-A FUNDAMENTAL CONCEPT IN PHOTOGRAPHY

 

In brief, the aperture works like our pupils; it’s the opening of the camera lens, which controls the amount of light that goes through the lens to the camera sensor.

 

 

The wider the aperture the brighter the image will be, and

the narrower the aperture the darker it will be.

It also plays a significant role in the depth of field and sharpness of the image.

 


 

The aperture of the lens is defined by a value known as “F-stop”.

 

 The larger the F-stop number is, the smaller the aperture and

the smaller the F stop number is the larger aperture .

 

The best aperture camera settings will depend on the light, the subject that you’re shooting, and the final look that you want in your image.


https://www.youtube.com/watch?v=YojL7UQTVhc&list=PLBWs5dCYykYXo6VmL9EuetvoLSH8bEHlt

 

 

2. SHUTTER SPEED

 

A KEY ELEMENT FOR PHOTOGRAPHY

 

The shutter speed is related to how long the camera shutter is open and capturing light.

This has a significant impact on the exposure;

a longer shutter speed will capture a brighter image.

a shorter shutter speed will translate into a darker image whereas

 

The best shutter speed settings will depend on the available light and the motion that you want to capture in your subject.


 

3.ISO –

ISO is simply a camera setting that will brighten or darken a photo. As you increase your ISO number, your photos will grow progressively brighter. 

For that reason, ISO can help you capture images in darker environments, or be more flexible about your aperture and shutter speed settings.

when you double your ISO speed, you are doubling the brightness of the photo. So, a photo at ISO 400 will be twice brighter than ISO 200, which will be twice brighter than ISO 100.


 

the higher the ISO,  the brighter the image will be, and

the lower the ISO, the darker the photograph will be.

 

The ISO number is usually measured using “ISO levels”, which follows this sequence:

 



ISO stands for International Organization of Standardization. 

 The International Organization of Standardization was a governing body responsible for standardizing sensitivity ratings for camera sensors. 

A high ISO number makes the roll of film more sensitive to light.

When the photography world made the switch to digital cameras, it retained the ISO standard to describe a digital sensor’s light sensitivity. 

 The minimum setting on most digital cameras is ISO 100, which is the least sensitive to light. The maximum light sensitivity setting varies by camera model. 



EXPOSURE TRIANGLE –THE PHOTOGRAPHY BASICS

 

The photography basics of aperture, shutter speed, and ISO, it’s time to put them all together!

According to this, all three elements must be in balance if you want to capture a correctly exposed image. 



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