How Image Stabilization Physically Works: Magnets, Gyros, and Floating Glass

Tilt a 600mm lens by a tenth of a degree, a movement too small to feel, and the image it projects slides about a millimeter across the sensor. Nearly every stabilizer in a modern still camera exists to cancel that millimeter while the shutter is open, either by shoving a piece of glass sideways or by flying the entire sensor on magnets. How each one does that explains why the stop counts printed on the box are so hard to compare. [Read More]