A CAMERA CONSTRUCTION OF THE TYPE EMPLOYING FILM USUALLY CONTAINED IN A CARTRIDGE AND HAVING PERFORATIONS ALONG ITS LENGTH FOR PROVIDING FRAME-BY-FRAME INDEXING. THE SENSING FINGER IS PROVIDED FOR ENGAGEMENT WITH THE RESPECTIVE PERFORATIONS, AND UPON ENGAGEMENT, THE FILM WINDING MEANS IS LOCKED. THE CAMERA SHUTTER IS UNLOCKED TO PERMIT TAKING OF A PICTURE, AND THE PICTURE TAKING ACTION OPERATES TO DISENGAGE THE FINGER FROM A FILM PERFORATION TO PROVIDE FOR INDEXING MOVEMENT. THE SHUTTER ACTUATING MEMBER IS DIRECTLY TIED TO A FIRST PIVOTING MEMBER WHICH MOVES A SECOND PIVOTING MEMBER, THE LATTER DIRECTLY CONTROLLING BOTH THE FINGER AND FILM ADVANCE LOCKING MEANS SO THAT THE MOVEMENTS OF THESE ELEMENTS ARE DIRECTLY DEPENDENT UPON EACH OTHER.