Polaroid Studio Series Pro Slave Flash Includes Mounting Bracket For The Pentax K-X, K-7, K-5, K-R, 645D, K20D, K200D, K2000, K10D, K2000, K1000, K100D Super, K110D, *ist D, *ist DL, *ist DS, *ist DS2 Digital SLR Cameras Which Has Any Of These (18-55mm, 50-200mm) Pentax Lenses Automatically synchronizes with your cameras internal or external flash - without wires or remote triggering devices Compact design makes it ideal for placing behind subject to eliminate shadows, create dramatic effects, etc Variable power settings let you control light output Pre flash sensor eliminates accidental triggering by red eye reduction mode Standard shoe mount and external bracker for multiple camera mounting options