Optical Viewfinder for dp0 Quattro, Albada-Inversed Galilean-Type OVF, Framing Guide for Accurate Composition, Eye-Level Monitoring in Bright Light, Mounts via Hot Shoe. Easily compose in bright light and at eye level with the VF-51 External Viewfinder for the wide-angle Sigma dp0 Quattro Digital Camera. Optimized for the 14mm 21mm equivalent lens of the dp0 this Albada-inversed Galilean-type OVF offers a framing guide for accurate composition without the need for the rear LCD. Additionally it mounts easily by sliding into the hot shoe.