Optem Long Working Distance Objectives
Optem® Long Working Distance (LWD) Objectives are the perfect machine vision and industrial imaging solution for applications demanding higher magnification, resolving power and chromatic performance without compromising working space around your subject.
Optem M Plan APO Infinity-Corrected Objectives are offered in magnifications of 2X, 5X, 10X, 20X, and 50X. These objectives provide flat-field imaging suitable for both zoom and fixed magnification requirements. They are apochromatically corrected and specifically designed for brightfield illumination.
Optem M Plan APO Wide Field Objectives are engineered to deliver uniform image quality across a wide field of view, supporting larger 30 mm image sensors. Optem LWD HR Objectives are available in 5X, 10X, and 20X and are designed to maximize NA for high-resolution critical inspection applications.
Optem M PLAN APO Objectives
| Part No. | Description | Magnification | Numerical Aperture | Working Distance (mm) | EFL (mm) | Resolution (um) | DOF (um) | Max Obj. FOV (mm) | Thread | Mass (g) |
| 28-21-02-001 | 2X M PLAN APO | 2X | 0.055 | 34 | 100 | 6.1 | 181.8 | ⌀12.00 | M26 x 36T | 233 |
| 28-21-05-001 | 5X M PLAN APO | 5X | 0.14 | 41 | 40 | 2.4 | 28.1 | ⌀4.80 | M26 x 36T | 220 |
| 28-21-10-001 | 10X Widefield M PLAN APO | 10X | 0.28 | 34 | 20 | 1.2 | 7 | ⌀3.0 | M26 x 36T | 172 |
| 28-21-11-001 | 20X M PLAN APO | 20X | 0.42 | 20 | 10 | 0.8 | 3.1 | ⌀1.20 | M26 x 36T | 284 |
| 28-21-50-001 | 50X M PLAN APO | 50X | 0.55 | 13 | 4 | 0.61 | 1.8 | ⌀0.48 | M26 x 36T | 299 |
Optem High Resolution Objectives
| Part No. | Description | Magnification | Numerical Aperture | Working Distance (mm) | EFL (mm) | Resolution (um) | DOF (um) | Max Obj. FOV (mm)1 | Thread | Mass (g) |
| 28-20-44-000 | 5X HIGH-RES | 5X | 0.225 | 34 | 40 | 1.50 | 181.8 | ⌀0.74 | M26 x 36T | 210 |
| 28-20-45-000 | 10X HIGH-RES | 10X | 0.45 | 19 | 20 | 0.74 | 28.1 | ⌀0.20 | M26 x 36T | 190 |
| 28-20-46-000 | 20X HIGH-RES | 20X | 0.60 | 13 | 10 | 0.56 | 6.1 | ⌀0.30 | M26 x 36T | 290 |
1Optem high-resolution objectives are not flat-field corrected and field curvature impacts imaging performance off-axis.
- 2X, 5X, 10X, 20X and 50X Magnifications
- Long working distances from 13 to 41 mm
- Numerical Aperture from 0.055 to 0.6
- Infinity-corrected objective lenses
- 95 mm parfocal distance
- Apochromatically corrected
- 400-700nm Operating Wavelength Range
- Brightfield Illumination
- 200mm Reference Focal Length
Optem M PLAN APO Objectives
| Part No. | Description | Magnification | Numerical Aperture | Working Distance (mm) | EFL (mm) | Resolution (um) | DOF (um) | Max Obj. FOV (mm) | Thread | Mass (g) |
| 28-21-02-001 | 2X M PLAN APO | 2X | 0.055 | 34 | 100 | 6.1 | 181.8 | ⌀12.00 | M26 x 36T | 233 |
| 28-21-05-001 | 5X M PLAN APO | 5X | 0.14 | 41 | 40 | 2.4 | 28.1 | ⌀4.80 | M26 x 36T | 220 |
| 28-21-10-001 | 10X Widefield M PLAN APO | 10X | 0.28 | 34 | 20 | 1.2 | 7 | ⌀3.0 | M26 x 36T | 172 |
| 28-21-11-001 | 20X M PLAN APO | 20X | 0.42 | 20 | 10 | 0.8 | 3.1 | ⌀1.20 | M26 x 36T | 284 |
| 28-21-50-001 | 50X M PLAN APO | 50X | 0.55 | 13 | 4 | 0.61 | 1.8 | ⌀0.48 | M26 x 36T | 299 |
Optem High Resolution Objectives
| Part No. | Description | Magnification | Numerical Aperture | Working Distance (mm) | EFL (mm) | Resolution (um) | DOF (um) | Max Obj. FOV (mm)1 | Thread | Mass (g) |
| 28-20-44-000 | 5X HIGH-RES | 5X | 0.225 | 34 | 40 | 1.50 | 181.8 | ⌀0.74 | M26 x 36T | 210 |
| 28-20-45-000 | 10X HIGH-RES | 10X | 0.45 | 19 | 20 | 0.74 | 28.1 | ⌀0.20 | M26 x 36T | 190 |
| 28-20-46-000 | 20X HIGH-RES | 20X | 0.60 | 13 | 10 | 0.56 | 6.1 | ⌀0.30 | M26 x 36T | 290 |
1Optem high-resolution objectives are not flat-field corrected and field curvature impacts imaging performance off-axis.
- 2X, 5X, 10X, 20X and 50X Magnifications
- Long working distances from 13 to 41 mm
- Numerical Aperture from 0.055 to 0.6
- Infinity-corrected objective lenses
- 95 mm parfocal distance
- Apochromatically corrected
- 400-700nm Operating Wavelength Range
- Brightfield Illumination
- 200mm Reference Focal Length
Additional Resources
When you select Optem® Long Working Distance Objectives from Excelitas, you benefit from precision-engineered optics designed to support demanding industrial and manufacturing environments. These objectives provide high-resolution imaging at extended working distances, enabling you to maintain physical clearance between the lens and your process without compromising optical performance.
Backed by decades of optical engineering expertise and rigorous quality standards, Excelitas ensures consistent magnification, minimal distortion, and long-term reliability. This translates into dependable imaging performance that supports accurate inspection, measurement, and alignment tasks across production workflows.
Optem® Long Working Distance Objectives are designed to provide precise magnification while maintaining a greater distance between the objective lens and the target. This optical design enables you to image components clearly even when space constraints, moving parts, or environmental factors prevent close proximity.
These objectives are typically used in machine vision systems, optical inspection stations, and metrology setups where accuracy and safety are critical. By preserving image quality at extended distances, they support reliable data capture and repeatable results in manufacturing processes.
You can deploy Optem® Long Working Distance Objectives across a wide range of manufacturing and industrial applications, including:
- Precision inspection of small or delicate components
- Dimensional measurement and metrology
- Automated machine vision systems
- Semiconductor and electronics manufacturing
- Medical device and micro-assembly processes
Their ability to maintain clarity and resolution at extended distances makes them ideal for environments that demand both precision and flexibility.
Excelitas offers a variety of Optem® Long Working Distance Objectives with different magnifications, numerical apertures, and working distances. This range enables you to select an objective that closely matches your system requirements, imaging targets, and field-of-view needs.
These objectives are designed for seamless integration with Optem optical systems and compatible imaging components, helping you configure a solution optimized for your specific manufacturing application.
Yes. Excelitas recognizes that manufacturing and inspection systems rarely follow a one-size-fits-all design. Optem® Long Working Distance Objectives can be configured or adapted to align with your required working distance, magnification range, mechanical interface, and integration constraints, especially when you’re balancing clearance, repeatability, and throughput on the production floor.
You also receive application-informed support from Excelitas experts to help ensure the objective matches your imaging stack and performance targets. This helps you maintain optical quality while improving system fit, simplifying integration, and protecting long-term stability in demanding manufacturing environments.