Zeiss 0.63× attachment/front‑optic (Part No. 435264‑9060‑000) — 127 mm free working distance. Designed for use with compatible Zeiss stereo microscope stands (e.g. Stemi 305/508 or similar Greenough‑style instruments that support interchangeable front optics). Provides lower magnification and larger field of view for macro-scale observation, dissection, inspection, or large‑specimen work. Optics and mount condition verified; delivers clear, distortion‑free stereo images with the correct working distance.