What is ISO?
ISO (International Standards Organization) is the level of light at which your camera is sensitive to, the lower the number the less sensitive your camera is to light. Compared to a higher one, where it becomes more sensitive. A lower one can be used for taking pictures on a sunny day, whereas a higher one can be used to take night shots. ISO speed examples range from ISO 100 to ISO 3200, the higher the ISO the higher the noise present within the picture, so when taking a picture you must take into account the light present where you are.
What does ISO effect?
Noise: The amount of noise directly affects the quality of the image, a higher noise will make the image more grainy and decrease the quality, compared to a lower one retaining all its quality. The is directly affects by how high the ISO is, for example, a ISO of 3200 will have a grainier image compared to a lower one with a crisp image.
Exposure: The ISO determines hows well exposed the photo will be by changing the sensitivity. The ISO scale is like the shutter speed, as when doubled the exposure is also doubled, as they are proportional to each other
Aperture: It is affected by the amount of light that travels through the hole in a lens, the larger the hole, the more light is passed to the camera sensor. This controls the depth of field which is the proportion of the screen that seems sharp. Aperture is usually expressed in f numbers, known as the focal ratio.
I decided to experiment with this idea, and so focused on taking pictures of the same object with different ISO settings, these were my results:
What does ISO effect? Noise: The amount of noise directly affects the quality of the image, a higher noise will make the image more grainy and decrease the quality, compared to a lower one retaining all its quality. The is directly affects by how high the ISO is, for example, a ISO of 3200 will have a grainier image compared to a lower one with a crisp image. Exposure: The ISO determines hows well exposed the photo will be by changing the sensitivity. The ISO scale is like the shutter speed, as when doubled the exposure is also doubled, as they are proportional to each other Aperture: It is affected by the amount of light that travels through the hole in a lens, the larger the hole, the more light is passed to the camera sensor. This controls the depth of field which is the proportion of the screen that seems sharp. Aperture is usually expressed in f numbers, known as the focal ratio. I decided to experiment with this idea, and so focused on taking pictures of the same object with different ISO settings, these were my results:
