95mm APO LWD Metallographic Objective Lens Wavelength 400-1100NM
The 95mm APO LWD Metallographic Objective Lens is a high-aperture, long-working-distance objective designed for use with metallographic and industrial microscopes.

Product Overview
The 95mm APO LWD Metallographic Objective Lens is a high-aperture, long-working-distance objective designed for use with metallographic and industrial microscopes. It operates across a 400-1100nm wavelength range and features a 200mm focal length with a 26mm screw thread. The lens is available in 2X, 5X, 10X, 20X, 50X, 20X ELWD, 50X ELWD, and 100X variants, each with a specified numerical aperture, working distance, and depth of focus. It is compatible with standard microscope bodies using M26 thread mounting.
- ModelM Plan APO
- Magnification2X, 5X, 10X, 20X, 50X, 20X ELWD, 50X ELWD, 100X
- TypeBF (Bright Field), ELWD (Extended Long Working Distance)
- Numerical Aperture0.055 to 0.80
- Working Distance6.0mm to 44.9mm
- Focal Length200mm
Key Benefits
- Long working distance up to 34mm allows inspection of thick or uneven metal samples without contact
- APO correction reduces chromatic and spherical aberrations for accurate color and edge definition
- Designed for 400-1100nm wavelength range, suitable for UV to near-infrared inspection
- M26 screw thread ensures compatibility with standard microscope bodies and accessory systems
- ELWD variants (20X and 50X) offer extended working distance while maintaining high resolution
- High numerical aperture (up to 0.80) enables detailed imaging at 100X magnification
- Consistent focal length of 200mm across all models simplifies system integration and calibration
- Optimized for use with digital cameras and video inspection systems in industrial settings
Application Scenarios
- Inspection of metal surfaces, welds, and castings in foundry and heat-treatment quality labs
- Failure analysis of machined parts and tooling under high magnification with minimal sample clearance
- Quality control of precision metal components in semiconductor and aerospace manufacturing
- Microstructure analysis of alloys and coatings in metallurgical labs using transmitted light
- Integration into a digital inspection system for documentation and comparison across batches
- Use in a multi-objective turret where consistent focal length and thread size simplify switching
Who It Is For
- Metallurgy, foundry and heat-treatment quality labs
- Industrial inspection lines for metal components and machined parts
- Failure analysis and materials science laboratories
- Semiconductor and precision engineering manufacturers
- Research labs conducting microstructure or surface defect analysis
Problems It Solves
- Short working distance objectives prevent inspection of thick or uneven metal samples without risk of collision
- Lack of APO correction causes color fringing and blurred edges in high-magnification metallography
- Inconsistent focal length across objectives complicates calibration and image alignment
- Mismatched thread sizes prevent secure mounting of objectives on standard microscope bodies
- Insufficient numerical aperture limits resolution at high magnifications, especially at 50X and 100X
- No support for extended wavelength range (400-1100nm) restricts use in UV or IR-enhanced imaging
Technical Features
- Apochromatic (APO) correction for reduced chromatic and spherical aberration
- Long working distance (W.D.) from 6.0mm to 44.9mm depending on magnification
- Focal length fixed at 200mm across all models for consistent system design
- M26 screw thread for secure mounting on standard microscope bodies
- Numerical aperture (N.A.) from 0.055 to 0.80, supporting high-resolution imaging
- Operating wavelength range: 400-1100nm for broad spectral compatibility
- Depth of focus (DOF±Δ) from 0.4μm to 14μm, depending on magnification
- Field of view (FOV) specified in both eyepiece and camera formats for system planning
- Available in standard and ELWD (Extended Long Working Distance) variants for high-magnification clearance
Specifications
| Model | M Plan APO |
|---|---|
| Magnification | 2X, 5X, 10X, 20X, 50X, 20X ELWD, 50X ELWD, 100X |
| Type | BF (Bright Field), ELWD (Extended Long Working Distance) |
| Numerical Aperture | 0.055 to 0.80 |
| Working Distance | 6.0mm to 44.9mm |
| Focal Length | 200mm |
| Focal Distance | 2mm to 100mm |
| Screw Thread | M26 |
| Length | 55.65mm to 94.5mm |
| Diameter | 34mm to 36mm |
| Field of View (Eyepiece) | 0.19X0.26 to 4.8x6.4 |
| Resolution Ratio | 0.4μm to 91μm |
| Depth of Focus | ±0.4μm to ±14μm |
| Wavelength Range | 400-1100nm |
| Focal Length (FL) | 200mm |
| Operating Distance (W.D.) | 6.0mm to 44.9mm |
| Standard Length | 66.5mm to 94.5mm |
| Standard Diameter | 34mm to 36mm |
Specifications are taken from the AMADA product data for this item. Confirm critical dimensions with us in writing before ordering.
Customization Options
- Available in standard and ELWD (Extended Long Working Distance) variants for 20X and 50X magnifications
- M26 thread ensures compatibility with standard microscope bodies and mounting systems
- All models share a 200mm focal length, enabling consistent system integration
- Supports use with digital cameras and video inspection systems via standard C-mount or adapter options
Comparison With Other Options
| Standard metallographic objective with shorter working distance | The 95mm APO LWD offers longer working distances (up to 44.9mm) for thick or uneven samples, reducing collision risk during inspection |
|---|---|
| Non-APO metallographic objective | The APO correction reduces chromatic and spherical aberrations, improving edge sharpness and color accuracy at high magnifications |
| Objective with different focal length | All models have a fixed 200mm focal length, simplifying system calibration and objective switching |
Use Guide
- Ensure the microscope body has an M26 thread to mount the objective securely
- Use ELWD variants (20X ELWD, 50X ELWD) when inspecting thick or irregular metal samples requiring extra clearance
- Select the appropriate magnification and N.A. based on required resolution and working distance
- Verify the camera sensor size matches the field of view specification for full frame capture
- Clean the lens surface with lens paper and appropriate solvent before mounting to avoid contamination
- Do not force the objective into the nosepiece; hand-tighten only to prevent thread damage
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View DetailsFrequently Asked Questions
What is the working distance for the 100X objective?
The 100X objective has a working distance of 6.0mm.
Can I use this lens with a digital camera?
Yes. The M26 thread allows attachment to standard microscope bodies, and the field of view specifications are provided for both eyepiece and camera use.
What is the focal length of all models?
All models have a fixed focal length of 200mm.
Is the lens compatible with standard microscope bodies?
Yes. The M26 screw thread is standard for most industrial and metallographic microscopes.
What is the wavelength range for this objective?
The objective is designed for use in the 400-1100nm range, covering visible and near-infrared light.
Are there ELWD versions available?
Yes. ELWD variants are available for 20X and 50X magnifications with extended working distances.
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