Eyepiece connecting device for mobile phone photography behind eyepiece of optical instrument

The utility model discloses an eyepiece connecting device for mobile phone photography behind an eyepiece of an optical instrument. Including a clamping ring, limiting blocks are symmetrically weldedto the outer surface of the clamping ring in a crossed mode with the circle center as the base point. A nut column is slidably connected into the limiting block, the nut column penetrates through thetop of the clamping ring, a screw is in threaded connection with the interior of the nut column, a clamping piece is welded to the bottom end of the nut column, a fixing frame is welded to the edge ofone end of the clamping ring and deviates from the circle center, and a first lead screw is movably embedded in the fixing frame. According to the utility model, the structure is simple;, according to the eyepiece connecting device for mobile phone photographing behind the optical instrument eyepiece, the distance between the optical instrument eyepiece and a mobile phone can be adjusted to adjust the object distance so as