Abbreviation: IS = "Image Stabilization" (Canon)
The abbreviation IS means "Image Stabilization" and is seen on Canon products.
Explanation from Canon
Canon's Image Stabilization System
Mechanism: Canon's IS system typically involves gyro sensors that detect movement and send this data to a microcomputer in the lens. This microcomputer then drives certain lens elements to move in a way that counteracts the shake.
Types of Stabilization:
- Standard IS: This is the general mode for most types of photography.
- Panning IS: This mode is for situations where the camera is being intentionally moved in a single direction, such as when panning to follow a moving subject.
- Tripod IS: Some Canon lenses detect when they are mounted on a tripod and adjust the IS mechanism accordingly. This is because the type of vibration experienced on a tripod (like from mirror slap or shutter movement) is different from hand-held shake.
Stops of Compensation: Canon often rates the eff
See examples of effected products
 | Canon EF 100mm F2.8 L IS USM Macro |
 | Canon EF 100-400mm F4.5-5.6 L IS USM |
 | Canon EF 200mm F2 L IS USM |