Canon LA-DC58F Conversion Lens Adapter for PowerShot A640, A630, A620 and A610 Digital Cameras Conversion lens adapter provides a 58-millimeter filter mount Adapter is designed for adding effects filters or other lens accessories Compatible with Canon PowerShot A620 and A610 digital cameras Adapter is required for the Canon WC-DC58N wide converter and TC-DC58N teleconverter lenses