This is a Sekonic L28c light meter. . This meter is a real classic in my view, beautifully made. This meter is primarily optimzied for incident use, but I believe the included attachments will also allow use in incident mode. Included also is the all-important "HIGH" slide (often missing when these meters are sold on the used market). This meter is quite sensitive and accurate, and best of all it does not use batteries! The readings are nearly identical with two other professional grade meters I own. A manual is available on the Butkus site if you wish to refer to it.