Sigma VF-31 External Optical Viewfinder for Sigma DP1 Quattro

The Sigma VF-31 External Optical Viewfinder is a nifty accessory that you can use as an alternative to the LCD screen of your Sigma dp1 Quattro digital camera. It mounts on the camera’s hot shoe, and comes with a dedicated framing guide that enables it to match the camera's 19mm f/2.8 lens. Accentuating the viewfinder’s look is an Albada-type inverted Galilean design.