One of the unique capabilities of cameras like DSLRs (and smartphone cameras) is their ability to preview the final picture based on controls that are typically expressed in terms of pixels. For example, if you use the available crop function in my camera, it will tell me exactly how much area I get to use instead of telling me what percentage of my final photograph that will be. This happens in a very quick and deliberate process called \u201cexposure\u201d: I press the mode dial to select \u201cAv\u201d, dials go up and down, setting up the pre-capture control values for functions like aperture and shutter speed; light comes in through one place (the lens) passes through an IR filter, hits a large series of electronics that translate those numbers into a voltage (in electronic terms\u2014an \u201cADC\u201d reading); those readings are then translated into brighter or darker sets of pixels (on your image sensor) which let us either see more or less information aboutThis is an article on what is aperture in photography. We cannot watch it unless you join us. Please post any questions in the replies section of this post.
What is ISO in Photography?
ISO is one of the three elements that affect exposure; the other two being aperture and shutter speed. The three elements are known as the Exposure Triangle.
What is the Meaning of ISO?
The acronym ISO commonly refers to the International Organization for Standardization, an organization that sets international standards for all different kinds of measurements.
How to Change ISO
In order to change the ISO, you will need to get out of Auto Mode. You can change the ISO in Manual, Shutter Priority, Aperture Priority, or Program Modes. Most cameras allow you to change the ISO in the menu, while others have a dedicated ISO button or dial.
How to Select the right ISO
Cameras have a range of ISO values. ISO values are sometimes referred to as ISO speed. The standard ISO values are: 100, 200, 400, 800, 1600, 3200. Some cameras will go as low as 50, while others go beyond 3200.