Carl Zeiss West Germany LD Epiplan 50x / 0.50 Long Working Distance Microscope Objective | MPN 442850

Up for sale is a specialized, vintage Carl Zeiss LD Epiplan 50x microscope objective, catalog part number 44 28 50. Expertly manufactured in West Germany, this infinity-corrected lens is optimized for professional reflected-light (epi-illumination) applications including advanced materials science, metallurgy, and semiconductor circuit trace diagnostics. 

The standout feature of this LD (Long Distance) objective is its extra-long 7.0mm working distance. This provides unparalleled clearance at high 50\times magnification, making it the industry standard for probing silicon wafers, auditing printed circuit boards (PCBs), or using physical measurement tools alongside high-magnification surface inspections.

Manufacturer: Carl Zeiss (West Germany) 

• Part Number: 44 28 50 / 442850

• Magnification: 50x

• Numerical Aperture (NA): 0.50

• Focal Standard: Infinity Corrected (\infty / 0)

• Working Distance: 7.0mm (Long Distance)

• Thread Type: Standard RMS Thread Pitch (M27 adapter compatible)

• Application: Reflected Light Brightfield, Materials Science, Metallurgy, Semiconductor Quality Control

Condition:

This unit is in excellent functional shape. The bright metal casing shows no wear from previous lab handling, all technical lettering remains highly legible. The glass elements have been visually checked and are clean, brilliant, and entirely free of internal clouding, wipe marks, scratches, or separating delamination lines. The original threads are crisp and strip-free. 

Please examine all high-resolution photos for a detailed view of the barrel condition, text markings, and optics.