International Organization for Standardization (ISO) is a film speed rating system adopted long before the days of digital. The higher ISO rating a piece of film has, the "faster" and more sensitive to light it is. Thus, you can increase a camera's ISO to compensate for poor lighting. Although digital SLR cameras don't use film, they still have an ISO setting that replicates film cameras. Learn change the ISO on a Canon Digital Rebel DSLR camera to take photos, regardless of the lighting.
Instructions
1. Flip the power switch on the top-right corner of the Digital Rebel to turn it on. Take the lens cap off if you are taking pictures.
2. Switch to a shooting mode that lets you manually choose the ISO. Turn the dial to the left of the power switch to toggle through modes. You can switch to "P" for "Program Mode," "Tv" for "Shutter Priority Mode," "Av" for "Aperture Priority," "M" for "Manual Mode" or "A-DEP" for "Auto Depth of Field Mode."
3. Press the "ISO" button next to the dial. Choose a new ISO. Use the up and down arrow buttons to select a new option and press "Set" to save the new setting.
ISO 100 and 200 are suitable if you are shooting outdoors on a sunny day. ISO 400 is perfect for low-light days or well-lit rooms indoors. Use ISO 800 and above for night shots or if you are in a room with poor lighting.
Increasing the ISO makes your Canon Digital Rebel more light-sensitive, but adds noise and grain to the image. This is especially noticeable at the highest ISO settings. Only increase the ISO if absolutely necessary. You can install noise reduction software on your computer to help remove noise and grain from high-ISO photos.
Tags: Digital Rebel, Canon Digital, Canon Digital Rebel, noise grain, poor lighting