Expand the expressive power of your camera further with a Conversion Lens (Converter).
A Wide Converter shortens, while a Tele Converter extends given focal length of the camera optics by an indicated factor.
You can also add a fisheye effect with a special Fisheye Converter.
Check which cameras allow usage of converters and be aware that a Conversion Lens Adapter might be required.
Consult camera's system chart to check on the necessity to use an adapter.