The anti-shake function of Sigma 18-200 second-generation lens can't reflect the effect.

1, there is no stable equipment such as tripod. First, ensure that the shooter is relatively stable; 2. Ensure that the lens is not out of focus; 3. At the telephoto end, anti-shake is really ineffective; 4. Anti-shake is effective for static subjects, but not meaningful for dynamic subjects, such as shooting a group of square dancers. ...