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Home / Products / Microscope Objective / 95mm APO LWD 400-1100NM Wavelength Metal
95mm APO LWD 400-1100NM Wavelength Metallographic Objective

95mm APO LWD 400-1100NM Wavelength Metallographic Objective

The 95mm APO LWD 400-1100NM wavelength metallographic objective is a high-performance lens series from Nanjing AMADA Instrument for precision inspection in metallurgical and materials analysis. Designed for use with microscope bodies, it supports a range of magnifications from 2X to 100X with apochromatic correction, long working distance (LWD) variants, and compatibility with 400–1100NM wavelength illumination. The series includes standard and ELWD (extra long working distance) models, all with M26 screw thread and 200mm focal length.

  • Apochromatic correction (APO) reduces chromatic and spherical aberrations for accurate color and edge definition in metallographic samples
  • Long working distance (LWD) models allow inspection of thick or irregularly shaped specimens without contact
  • Supports 400–1100NM wavelength range for use with UV, visible, and near-infrared illumination sources
  • Consistent 200mm focal length across all models ensures compatibility with standard microscope bodies
  • M26 screw thread standardizes mounting across the series for easy interchangeability
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Technical features

  • Model: M Plan APO 2X, 5X, 10X, 20X, 50X, 20X ELWD, 50X ELWD, 100X
  • Numerical aperture: 0.055 (2X) to 0.80 (100X)
  • Working distance: 34 mm (2X) to 6.0 mm (100X); ELWD variants offer 30.9 mm (20X ELWD) and 20.1 mm (50X ELWD)
  • Focal length: 200 mm for all models
  • Focal distance: 100 mm (2X), 40 mm (5X), 20 mm (10X), 10 mm (20X), 4 mm (50X), 2 mm (100X)
  • Field of view (eyepiece): 12 mm (2X), 4.8 mm (5X), 2.4 mm (10X), 1.2 mm (20X), 0.5 mm (50X), 0.24 mm (100X)
  • Field of view (camera): 4.8×6.4 mm (2X), 1.92×2.56 mm (5X), 0.96×1.28 mm (10X), 0.48×0.64 mm (20X), 0.19×0.26 mm (50X), 0.1×0.13 mm (100X)
  • Resolution: 91 μm (2X), 14 μm (5X), 3.5 μm (10X), 1.55 μm (20X), 0.61 μm (50X), 0.4 μm (100X)

Who it is for

  • Metallurgical labs in automotive, aerospace, and heavy machinery industries
  • Materials science researchers requiring high-resolution imaging across extended wavelengths
  • Electronics manufacturers inspecting PCB substrates and metal interconnects
  • Importers sourcing standardized metallographic objectives for industrial microscope systems

Specifications

ModelM Plan APO 2X, 5X, 10X, 20X, 50X, 20X ELWD, 50X ELWD, 100X
Numerical Aperture0.055 to 0.80
Working Distance34 mm (2X) to 6.0 mm (100X)
Focal Length200 mm
Focal Distance100 mm (2X), 40 mm (5X), 20 mm (10X), 10 mm (20X), 4 mm (50X), 2 mm (100X)
Field of View (Eyepiece)12 mm (2X) to 0.24 mm (100X)
Field of View (Camera)4.8×6.4 mm (2X) to 0.1×0.13 mm (100X)
Resolution91 μm (2X) to 0.4 μm (100X)
Depth of Focus±34 μm (2X) to ±0.4 μm (100X)
Screw ThreadM26
Length55.65 mm (5X) to 94.5 mm (100X)
Diameter34 mm (2X–50X), 36 mm (100X)

Use guide

  • Select model by required magnification and working distance (standard vs ELWD)
  • Use ELWD variants when inspecting thick, textured, or non-flat metal samples
  • Ensure microscope body supports 200mm focal length and M26 thread for secure mounting
  • Match resolution and depth of focus to sample surface variation and illumination source

FAQ

What is the working distance for the 50X ELWD model?
20.1 mm
Can I use this objective with a 100mm focal length microscope?
No. All models are designed for 200mm focal length; using with 100mm will cause focus and image distortion.
Is the 100X objective suitable for oil immersion?
No. This is a dry objective; oil immersion is not supported and may damage the lens or coating.
What is the screw thread size?
M26 for all models in the series.
What wavelength range does it support?
400–1100NM, compatible with UV, visible, and near-infrared illumination sources.

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