What is ISO and How it Works ???(Photography Pro)

What is ISO?

In very basic terms, 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.

However, raising your ISO has consequences. A photo taken at too high of an ISO will show a lot of grain, also known as noise, and might not be usable. So, brightening a photo via ISO is always a trade-off. You should only raise your ISO when you are unable to brighten the photo via shutter speed or aperture instead (for example, if using a longer shutter speed would cause your subject to be blurry).

ISO Brightness Chart
Note how much brighter the image gets when ISO is increased from 100 to 1600

What is the Meaning of ISO?

The acronym ISO stands for “International Organization for Standardization”. However, camera ISO does not directly refer to the organization that creates various technology and product standards.

Low vs High ISO Noise Visibility

To give an example of two photos taken at different ISO values, take a look at the comparison below. Pay attention to the level of noise (graininess and blotchy colors) in the images:

ISO 200 and ISO 3200 Comparison

The difference is clear – the image at ISO 3200 has much more noise than the one at ISO 200 (which I brightened with a long shutter speed instead). This is why you should avoid high ISOs whenever possible, unless conditions require you to use them.

Comments

Post a Comment

Popular posts from this blog

Difference in DSLR and Mirrorless camera(PhotographyPro)

Difference in DSLR and Mirrorless camera Dslr      A   digital single-lens reflex camera   ( digital SLR   or   DSLR ) is a   digital camera   that combines the optics and the mechanisms of a   single-lens reflex camera   with a   digital imaging sensor .  The reflex design scheme is the primary difference between a DSLR and other digital cameras. In the reflex design, light travels through the lens and then to a mirror that alternates to send the image to either a prism, which shows the image in the   viewfinder , or the image sensor when the shutter release button is pressed. Mirrorless camera A  mirrorless interchangeable-lens camera  ( MILC ) or simply  mirrorless camera , also called  digital single lens mirrorless  ( DSLM ), is a  photo camera  featuring a single, removable  lens  and a  digital display . The camera does not have a  reflex mirror  or  optical viewfinder  like a  digital single-lens reflex  (DSLR) camera. [1]  Many mirrorless cameras retain a mechanical shutter. L
Read more