Introduction to DSLR

Shutter Speed

• The shutter speed setting controls how long the shutter opens to expose the image sensor to that light.
• Open it for just a millisecond and you can freeze a fast moving subject.
• Alternatively, you can show the movement of a fast moving subject by keeping it open longer with a slow shutter speed.

ISO

• The ISO is how sensitive your image sensor is to light.
• With the ISO setting, a camera's image sensor can be adjusted to detect more, or less light as needed for a good exposure.
• The higher the ISO, the more sensitive the sensor will be, and the brighter the image will be.
• The lower the ISO, the less light it's going to bring in, and the darker the image is going to be.
• If you're shooting in low light, you will want to boost your ISO so that the image will be brighter.
• If you're shooting in a bright, sunny place, you'll want to lower your ISO, or the image will be overly-bright.
• High ISO will cause graininess so as a rule use the lowest ISO possible