Gossen Digisix GO 4006 Digital / Analog Exposure Meter Developed for high precision and reliability Digital LCD read out in EV is easily transferred to a setting ring where all the shutter speed/f-stop combinations can be read at a glance Meter sensitivity range is 0-18EV (in 1/3 increments) Angle of Coverage - 25-degrees Apertures - f/1 to f/32