HIGH-RESOLUTION FA INDUSTRIAL LENS
20MP 50mm C-Mount Machine Vision Lens for 1.1-Inch Cameras
The PMS-LFHHG-5020M(B) is a fixed focal length FA lens for high-resolution industrial imaging. It supports up to 20MP 1.1-inch cameras, provides a 4/3-inch image circle and combines low distortion with manual focus and iris adjustment for stable machine vision integration.
![PMS-LFHHG-5020M(B) 20MP 50mm C-mount machine vision lens for 1.1-inch cameras]()
20MP 50mm C-mount FA lens designed for high-resolution industrial cameras up to 1.1 inch, with a 4/3-inch image circle.50mmFOCAL LENGTH
20MP1.1-INCH CAMERA
C-MountCAMERA INTERFACE
F2.0-F22IRIS RANGE
4/3-Inch Image Circle Low Distortion 420-1000nm Focus + Iris Lock
Who Is This 50mm Machine Vision Lens Designed For?
This lens is intended for machine vision system integrators, automation equipment manufacturers and factory vision engineers who need a narrow-to-medium field of view, a longer installation distance and reliable imaging on a high-resolution C-mount camera.
It is a practical candidate when the project requires:
- A 50mm focal length for a smaller inspection area or longer working distance
- Compatibility with 1.1-inch or smaller industrial camera sensors
- A large 4/3-inch image circle for sensor coverage margin
- Manual focus and iris settings that can be locked after commissioning
- Low distortion for inspection, positioning, OCR and surface analysis
Why Use a 50mm Machine Vision Lens?
Compared with a shorter focal length lens, a 50mm lens provides a narrower field angle at the same sensor size and working distance. This allows a smaller inspection area to occupy more camera pixels and can create additional space for lighting, fixtures and mechanical parts.
- Suitable for medium-to-small fields of view
- Useful when the camera must be installed farther from the object
- Helps enlarge smaller features within the captured image
- Supports visible and near-infrared imaging from 420-1000nm
For a wider field of view, compare the 35mm C-mount FA lens . For a narrower field or longer installation distance, review the 75mm C-mount machine vision lens .
![Field-of-view comparison between a shorter focal length lens and a 50mm machine vision lens]()
A 50mm focal length provides a narrower field angle than shorter lenses at the same sensor size and working distance.Sensor Format and Image-Circle Compatibility
The specification lists a 4/3-inch image circle, while the 20MP rating refers specifically to 1.1-inch cameras. A larger image circle can help reduce the risk of incomplete sensor coverage, but final edge resolution and illumination should still be verified with the exact camera model.
![Sensor format and image-circle reference for the PMS-LFHHG-5020M(B) machine vision lens]()
The usable field of view depends on the camera's active sensor dimensions, working distance and focus position.| Sensor Format | Field Angle (D × H × V) | Object Size at MOD (D × H × V) | Distortion |
|---|
| 4/3 inch | 26.0° × 21.0° × 15.8° | 118.9 × 95.1 × 71.3mm | -0.13% @ y=11.5mm |
| 1 inch | 18.3° × 14.7° × 11.1° | 82.7 × 66.1 × 49.6mm | -0.05% @ y=8.0mm |
| 1/2 inch | 9.2° × 7.3° × 5.6° | 41.4 × 33.1 × 24.9mm | -0.01% @ y=4.0mm |
Selection note: Actual field of view must be calculated from the active sensor dimensions, working distance and focus position. For a full 4/3-inch high-resolution sensor, confirm edge resolution and illumination before production approval.
Lockable Focus and Iris for Stable Installation
![Manual focus, iris lock screws and C-mount structure of the PMS-LFHHG-5020M(B) lens]()
Separate manual focus and iris locking screws help maintain the selected settings after system commissioning.Focus Lock Screw
Helps maintain the selected focus position after image setup.
Iris Lock Screw
Reduces unintended aperture changes during equipment use or maintenance.
C-Mount Interface
Designed for standard C-mount machine vision cameras.
| Focus Control | Manual | Iris Control | Manual |
|---|
| Focusing Range | 0.3m to Infinity | Back Focal Length | 20mm |
|---|
| Filter Thread | M46 × P0.75 | Weight | 219g |
|---|
| Overall Diameter | 48mm | Overall Length | 67mm |
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| Operating Temperature | -20°C to +60°C |
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Typical Machine Vision Applications
The lens is suitable for inspection tasks where a 50mm focal length, high-resolution camera support and stable manual settings are more important than telecentric magnification.
![Typical inspection applications for a 50mm C-mount machine vision lens]()
Typical uses include PCB inspection, connector inspection, OCR, positioning and industrial surface inspection.This is a conventional FA lens rather than a telecentric lens. For tight dimensional tolerances or objects with significant height variation, a telecentric lens is generally the safer optical choice.
When This Lens Is a Good Fit
- Your camera uses a C-mount interface
- Your camera sensor is 1.1 inch or smaller
- You require a 50mm focal length and a narrower field of view
- Your system can use manual focus and iris settings
- Your application involves inspection, OCR, positioning or surface imaging
- Your working distance is at least approximately 0.3m
When to Consider Another Optical Solution
- A shorter working distance or much wider field of view is required
- Motorized focus, autofocus or automatic iris control is required
- Object height variation must not change image magnification
- The project requires very tight dimensional measurement tolerances
- The exact camera requires edge performance beyond the verified 1.1-inch 20MP rating
Information Required for Lens Selection
| Please Provide | Why It Matters |
|---|
| Camera model and sensor size | Confirms mount, image-circle and resolution compatibility |
| Required field of view | Confirms whether 50mm is the correct focal length |
| Working distance | Determines actual field of view and installation fit |
| Smallest feature or defect | Checks whether the image sampling is sufficient |
| Accuracy requirement | Clarifies whether an FA lens or telecentric lens is more suitable |
| Lighting and wavelength | Confirms compatibility with visible or near-infrared imaging |
Manufacturer-Direct Optical and Application Support
POMEAS supports machine vision projects through lens selection, camera compatibility review, sample evaluation, quality inspection and repeat-order communication. This helps customers assess the complete imaging setup rather than selecting a lens by focal length or megapixel rating alone.
- Direct communication for camera, field-of-view and working-distance matching
- Application review before quotation or sample approval
- Quality inspection and consistency checks before delivery
- Support for repeat orders and automation equipment projects
![POMEAS manufacturer-direct optical selection, inspection and application support]()
Manufacturer-direct support can help reduce selection risk before sample testing and repeat-order production.Evidence reminder: Claims about in-house optical design, lens processing, mechanical machining, dust-free assembly, production capacity or certifications should only be published after they are matched to approved factory evidence.
Frequently Asked Questions
What is the difference between a 50mm and a 35mm machine vision lens?
At the same working distance and sensor size, the 50mm lens provides a narrower field of view and higher image magnification. It may also allow the camera to be installed farther from the object for a similar field of view.
Can this lens be used with a 4/3-inch camera?
The datasheet lists a 4/3-inch image circle. However, the 20MP statement specifically refers to 1.1-inch cameras, so full-frame edge resolution on a high-resolution 4/3-inch sensor should be confirmed with the exact camera.
Can the focus and iris be locked?
Yes. Separate focus and iris locking screws help maintain the selected settings after setup.
Is this lens suitable for dimensional measurement?
It can support general inspection and calibrated measurement tasks, but it is not telecentric. A telecentric lens is generally safer for tight dimensional tolerances or objects with height variation.
What information should be provided before ordering?
Provide the camera model, sensor size, pixel size, field of view, working distance, smallest feature, accuracy requirement, lighting and available installation space.
Related Machine Vision Lens Options
Request Lens Selection Support
Send POMEAS your camera model, required field of view, working distance and inspection target. The optical and application team can help confirm whether the PMS-LFHHG-5020M(B) provides the required image coverage, detail and installation distance before quotation.