After a simple surveying the development of the speckle camera in Yunnan Observatory, the R&D and the properties of a new speckle camera YOSC 4a time framed 2 dimensional photon counting speckle image detecting system are introduced. The test and analyses for the camera showed that the limit magnitude will be 12 m when it is used to do the observation of astronomical speckle imaging; and some real observation data of speckle images and image reconstructed results are given.