This iteration of the MM3 GA/45 is compatible with Opticron’s HR3,  HDF-T Zoom, and SDLV-3 eyepieces to give you a wide variety of viewing angles and magnification to choose from. The 2-speed focusing system features an 8:1 reducer mechanism to allow for fast coarse and precision fine focusing, while the 45° angled viewing configuration places your head in a comfortable viewing position when standing, sitting, or lying prone. For optimum eyepiece orientation, the tripod collar rotates up to 90° in both directions. A 1/4″-20 mount makes it compatible with many tripods, quick release plates, and other popular support systems like window mounts.