Dust clinging caused by static charge.
Small particles of dust can cling due to molecular attraction, which can be removed by the strong vibrations caused by the SSWF.

1. Ex.1) Metallic particles caused by mechanical abrasion within the shutter and other internal parts.
2. Ex.2) Fine pollen from cedar trees.

* Large pollen particles from lily flowers etc. include a viscous fluid which cannot be completely removed.

* Viscous particles cannot be completely removed by the Super Sonic Wave Filter (SSWF). Dust particles themselves may be removable by ultrasonic waves, but complete removal requires higher energy. In such a case, the surface must be washed. However, it is quite rare for a viscous fluid to reach the camera's imaging sensor.
Ex.) Rain, saliva and other viscous fluids.