This Norwood Flashmate is essentially a double image rangefinder with a dial computer showing footage on one side and exposure computation for different types of flashbulbs on the other side. In use, you align the double image of the subject, and the computer indicates which f-stop and shutter speeds to use with different types of bulbs. It has a shoe that fits a camera’s accessory jack and it comes with its original box and instructions. Rangefinders like this are very useful for estimating footage for non-rangefinder cameras, surveying, and other footage/distance applications. To see over 200 related items, click on the “other ads by this user” link at the right. This item is in excellent condition, but is sold as-is, no returns, so pickup and inspection in Tucson, Arizona, is preferred. Out of town buyers email with any questions and for payment and shipping instructions.