Both the DX12R and DX-8R are dedicated ringlight flashes that provide even, shadow-free light for medical, industrial or creative applications. They accept the full range of Sunpak dedicated modules. The DX-12R is designed to work with 35mm and medium format systems having filter diameters up to 77mm. The DX-8R offers a guide number of 26 with ISO 100 film. Both ringlight flashes offer power ratio control over a 5 f/stop range.