The Truth about Digital ISO

The video explains that ISO is not the sensitivity of the camera sensor but an amplification setting applied to light after it is collected. It compares ISO to turning up the volume on a radio, where the signal remains unchanged but is amplified. A test is suggested to demonstrate that ISO does not affect noise in images. The video concludes that the amount of light received by the camera, controlled by aperture, shutter speed, and exposure, determines the signal-to-noise ratio, similar to how a better radio signal results in clearer sound.

What is ISO in the context of photography?

• A measure of camera exposure

• A type of camera lens

• An amplification setting applied to light

• The sensitivity of the image sensor

How is the concept of ISO compared to a radio in the video?

• ISO is like tuning the radio's frequency

• ISO is like adjusting the radio's volume

• ISO is like turning the radio on and off

• ISO is like changing the radio station

What does the test involving different ISO settings demonstrate?

• ISO determines the shutter speed

• ISO directly affects the color of an image

• ISO changes the aperture of the camera

• ISO does not affect noise and grain in an image

What factors control the amount of light a camera receives?

• Lens type and camera model

• Aperture, shutter speed, and exposure

• ISO and white balance

• Focal length and ISO

What happens when less light is collected by the camera?

• The image has a higher resolution

• The image becomes sharper

• The image becomes more colorful

• The image has more noise and grain