Zeiss 0.63× front‑optic objective for the Stemi 305 stereo microscope series. Part No. 435263‑9150‑000. Extends working distance beyond standard eyepiece configuration; ideal for wider field stereomicroscopy and macro‑scale observation. Designed for use with Stemi 305’s compatible stand and illumination modules. Optical surfaces checked — delivers clear, distortion‑free stereo images suitable for dissection, inspection, and documentation work.