Twist Focus Tribrach features twist focus (2.5X mag) and leveling screws with center line</br>8-min vial?? three-prong forced centering and a 5/8 x 11 base</br>Focusing range of 1.5 to 50 feet (0.5 to 15 m)</br>Yellow or Black</br></br>Product Description</br></br>u