Case Note: Ricoh HA-2 Adapter required for GX-100 & Gx-200, Ricoh HA-3 Adapter required for GXR 24-72mm Lens.This is a convenient accessory for shooting at a wider wide-angle and for achieving a more extreme sense of distance. Magnification is 0.79x, and used at the maximum wide-angle setting it enables 19 mm ultra-wide-angle photography. Optimized for the optical system of the camera unit, the DW-6 consists of three glass lenses. To Mount this lens a Hood / Adapter is required. Use the Ricoh HA-2 Adapter for the GX-100 & Gx-200 and the HA-3 Adapter for the GXR 24-72mm Lens When a conversion lens is attached, the internal flash cannot be used because vignetting would occur.