While there are versions labeled TXBOO, this one is labeled 14024B. There's also a variation, 14023 (TZFOO), but the difference lies in the body mount. The 14023 has an L-mount on the body side, so you'd need an adapter like OUBIO to use it with an M-type camera. However, the 14024 has an M-mount on the body side, allowing it to be directly attached to an M-type body. SFTOO (12035) and SQTOO (12037) can be attached to the accessory shoe.