The Vivitar 2800 Auto Thyristor flash is a manual flash that was designed to be used with 35mm film cameras. The Vivitar 2800 fires at one intensity and you adjust the your cameras aperture to select the proper exposure. (Modern flashes communicate with the cameras they are attached to and use the camera’s metering system to adjust their power output. ) The flash uses four “AA” batteries and has input jack for a sync cord, allowing the camera to be used remotely. Writer Bio
