Carl Zeiss 47 50 61 SV8 Stereo Zoom Microscope Auxiliary Objective f=100

Carl Zeiss 47 50 61 SV8 Stereo Zoom Microscope Auxiliary Objective f=100

This is a genuine Carl Zeiss auxiliary objective lens for the SV8 stereo zoom microscope, part number 47 50 61, designated "S f=100." It mounts to the SV8's front objective port via a slip-fit bayonet with a knurled locking screw, and changes the effective magnification range of the SV8 system when fitted. The lens element is clear with no visible chips, cracks, or significant haze.

Specifications & What's Included

• Brand: Carl Zeiss
• Part Number: 47 50 61
• Designation: S f=100
• Code marking: 03 (revision/production code)
• Compatible with: Carl Zeiss SV8 Stereo Zoom Microscope
• Focal length: f=100 mm (auxiliary/supplementary objective)
• Mount type: Slip-fit bayonet with knurled locking screw
• Housing: Square black shroud over silver metal body
• Lens element condition: Clear — no chips, cracks, or significant haze observed
• Body condition: Significant chrome chipping and paint loss on silver housing (cosmetic)
• Includes: Objective lens only — no case or additional accessories

Applications

The Carl Zeiss SV8 is a classic Greenough-design stereo zoom microscope produced from the 1960s through the 1980s, widely used in electronics inspection, biological dissection, watchmaking, jewelry work, and light industrial quality control. Auxiliary objectives like this f=100 lens attach to the front of the SV8's objective turret to shift the working magnification range — an f=100 auxiliary reduces the zoom system's standard magnification, increasing the working distance between the objective and the specimen. This is useful when inspecting large or tall samples, or when additional clearance is needed for tools or probes beneath the objective. These accessories remain sought after by SV8 owners maintaining and upgrading their instruments, as Zeiss SV8 systems are still in active use in lab, service, and workshop settings worldwide.