Camera and Lighting - Exposure research

In photography, exposure is the amount of light which reaches your camera sensor or film. It is a crucial part of how bright or dark your pictures appear.

There are only two camera settings that affect the actual “luminous exposure” of an image:shutter speed and aperture. The third setting, camera ISO, also affects the brightness of your photos, and it is equally important to understand. Also, you can brighten or darken a photo by editing it in post-processing software like Photoshop on your computer.

It sounds basic, but exposure is a topic which confuses even advanced photographers. The reason is simple: For every scene, a wide range of shutter speed, aperture, and ISO settings will result in a photo of the proper brightness. You haven’t “mastered exposure” once you can take a photo that’s the right brightness. Even your camera’s Auto mode will do that most of the time. Instead, getting the proper exposure for a photo is about balancing those three settings so the rest of the photo looks good, from depth of field to sharpness.

In this video exposure is described simply as the amount of light you think your subject needs.

The exposure triangle is a common way of associating the three variables that determine the exposure of a photograph: aperture, shutter speed, and ISO. One must balance all three of these to achieve a desired result, an adjustment of one requiring adjustments of at least one of the others. They do not only affect exposure, but are also the largest determiners of the global appearance of an image; thus, their mastery is absolutely crucial both for technique and composition.

The ISO refers to how sensitive your camera is to light; the higher it is, the brighter your photo looks and the more noise or grain it gets. The aperture is the size of the opening of your lens; the lower the number, the bigger the opening is, and the more light your camera takes in and the shallower the depth of field. The shutter speed refers to how long the camera shutter is open when taking a photo; faster speed means less blur.Each of these components can be adjusted to compensate for the settings of the other. As in the example in the video, you ideally want to keep the ISO at 100 for minimal grain or noise. What you adjust is the aperture and shutter speed to control how much light comes in, minimize blur, and get the right depth of field for what you’re shooting.

Bibliography - 

Cox.S (2017) What is Exposure ( A Beginners Guide). Found at : https://photographylife.com/what-is-exposure (accessed 19 September 2019)
The phoblographer (2019)  Get the Hang of the Exposure Triangle With This Tutorial. Found at: https://www.thephoblographer.com/2019/01/09/exposure-triangle-tutorial/ (accessed 24 september     2019)

Video found at: https://www.youtube.com/watch?v=OrQ0tO7rzpk (Accessed: 19 September 2019)
Video 2 found at: https://www.youtube.com/watch?v=fCAcSbObbE0&feature=youtu.be (accessed:                                24 September 2019)
Image found :https://www.thephoblographer.com/2019/01/09/exposure-triangle-tutorial/ (accessed 23                       september 2019)