"Super-Tacumar 35mm f3.5" is a small lens, but sharp and has great color contrast. There are 3 versions with the same name and specifications. This upgrade housing is custom designed for the second version. - See the link below for details https://www.pentaxforums.com/lensreviews/S-M-C-Super-Auto-Takumar-35mm-F3.5.html As a mini cine lens housing type, it has almost the same characteristics as the Super Takuma 50mm f1.4 in the previous video, so please refer to the previous video for a detailed explanation. * Required parts other than 3D printer output - 2_M3 x 8mm bolts (flat head) - 49-52, 52-55, 55-58, 58-62, 62-67 step-up ring (filter adapter) - M42 to EF mount conversion adapter - Rubber follow focus gear ring (optional)