Computar VM300 Viewfinder

Designed for surveillance and other video applications, the VM300 Viewfinder from computar is a handheld optical device that functions like a director's viewfinder. It replicates the field of view of a camera's lens based on sensor size and focal length. Select from four common surveillance camera sensor sizes to determine what focal length lens you should use to capture a particular scene with a particular camera. The viewfinder has an adjustable ring in order to match the camera sensor format and lens focal length to what you see in the viewfinder.