Zeiss 2.0× front‑optic / attachment lens — Part No. 435264‑9200‑000. Designed for Zeiss stereomicroscopes (e.g. Stemi 508 / Stemi 305 Greenough‑style stands with interchangeable optics). Provides higher magnification with a working distance of ~35 mm when used with compatible eyepieces and mounts. Ideal for detailed stereo imaging, inspection of small specimens, or tasks requiring increased magnification. Optical surfaces and mount condition verified; delivers sharp, distortion‑free stereo images when properly mounted.