The Sigma VF-11 Optical Viewfinder allows you to frame images in your Sigma DP-1 Digital Camera. It is attached to the hot shoe mount of the camera.The Sigma VF-11 External Viewfinder avoids the need of the LCD monitor to frame imagesYou can frame images accurately and save battery power as well with this optical viewfinderThe Sigma DP-1 Digital Camera Viewfinder helps you in brighter lighting conditions, where viewing the LCD monitor may be difficult