12mm 2/3-Inch 10MP Low-Distortion C-Mount Lens | POMEAS

12mm 10MP Low-Distortion C-Mount Lens for 2/3-Inch Cameras

The POMEAS PMS-LFEHH-1228M(B) is a 12mm fixed focal FA lens designed for C-mount machine vision cameras with sensors up to 2/3 inch. It is rated for 10MP imaging and features an F2.8-F16 manual iris, a 0.15 m to infinity focusing range, and a specified wavelength range of 420-1000 nm.

The 12mm focal length provides a balanced field of view between short wide-angle lenses and longer focal-length inspection lenses. It can cover a moderately wide inspection area while placing more camera pixels on the target than an 8mm lens used with the same sensor and working distance.

Published distortion values are provided for 2/3-inch, 1/2-inch, and 1/3-inch sensor formats, making the lens relevant for component inspection, part localization, label verification, assembly checking, and calibrated image measurement.

Key Features

10MP Resolution Rating

The PMS-LFEHH-1228M(B) is rated for 10MP machine vision imaging.

This makes it suitable for industrial cameras that require more image detail than lower-resolution general-purpose lenses. Final compatibility must still be evaluated using the camera sensor dimensions, pixel size, required field of view, and smallest feature that must be detected.

Two cameras with the same megapixel count may use different pixel pitches and sensor formats. Megapixel count alone is therefore not sufficient for final lens selection.

Supports Sensors up to 2/3 Inch

The lens supports cameras with sensors up to the specified 2/3-inch format and an active image size of 11 mm.

It may also be used with smaller 1/2-inch and 1/3-inch sensors when the camera has a compatible C-mount interface. A smaller sensor records a smaller central portion of the lens image and produces a narrower field of view at the same working distance.

Sensors larger than 2/3 inch should not be used unless image-circle coverage and edge performance are separately confirmed.

12mm Focal Length for Balanced Scene Coverage

The 12mm focal length provides a practical balance between field coverage and pixel concentration.

Compared with an 8mm lens used at the same working distance, the 12mm model captures a narrower area and places more of the camera’s available pixels across the inspected object. Compared with a longer focal-length lens, it retains a wider field of view and can be easier to install in compact automation equipment.

This makes it suitable when an 8mm lens captures too much background but a longer focal length would make the inspection area too narrow.

Published Low-Distortion Performance

The product sheet specifies the following distortion values:

• 2/3-inch sensor: 0.037% at y = 5.5 mm
• 1/2-inch sensor: -0.17% at y = 4.0 mm
• 1/3-inch sensor: -0.15% at y = 3.0 mm

These values are useful for applications involving edge detection, component positioning, feature localization, and calibrated dimensional inspection.

The complete camera and lens system should still be calibrated and tested against the actual measurement tolerance. A published lens distortion value is not the same as guaranteed system measurement accuracy.

420-1000 nm Wavelength Range

The specified 420-1000 nm wavelength range covers visible and near-infrared illumination bands commonly used in machine vision systems.

This allows the lens to be considered for applications using visible LED lighting or selected near-infrared illumination within the stated range.

The specification does not confirm identical focus position, transmission, or resolution performance at every wavelength. Systems using a specific narrow-band light source should be tested with the selected camera, filter, and illumination.

0.15 m Minimum Focusing Range

The lens has a published focusing range from 0.15 m to infinity.

This supports relatively compact inspection stations where the camera must be positioned near the object. The product sheet also provides reference object-size and field-of-view data for different sensors and working distances.

The exact mechanical reference point used for the focusing distance should be confirmed when installation clearance is tightly controlled.

F2.8-F16 Manual Iris

The adjustable F2.8-F16 iris allows the integrator to balance image brightness, exposure time, and depth of field.

Opening the iris allows more light to reach the camera sensor and may help reduce exposure time. Closing the iris can increase depth of field when the inspected object has moderate height variation, although stronger illumination may then be required.

The final aperture should be selected together with the camera exposure settings and machine vision lighting.

Compact C-Mount Structure

The lens uses a C-mount interface and has a maximum outer diameter of Ø29 mm according to the dimension drawing.

Its compact housing can help reduce mechanical interference with camera brackets, lighting, protective covers, and nearby automation components.

The camera mount, filter thread, available installation space, and clearance around the adjustment controls should all be checked before installation.

Technical Specifications

Model: PMS-LFEHH-1228M(B)
Lens Type: Fixed focal machine vision FA lens
Resolution Rating: 10MP
Focal Length: 12 mm
Maximum Sensor Format: 2/3 inch
Active Image Size: 11 mm
Wavelength Range: 420-1000 nm
Aperture Range: F2.8-F16
Focusing Range: 0.15 m to infinity
Camera Mount: C-Mount
Filter Thread: M27 × 0.5 mm
Back Focal Length in Air: 8.43 mm
Focus Adjustment: Manual
Iris Adjustment: Manual
Operating Temperature: -20°C to +60°C
Maximum Outer Diameter: Ø29 mm

Angle of View

2/3-Inch Sensor

Diagonal: 49.2°
Horizontal: 40.3°
Vertical: 30.8°

1/2-Inch Sensor

Diagonal: 36.9°
Horizontal: 29.9°
Vertical: 22.7°

1/3-Inch Sensor

Diagonal: 28.1°
Horizontal: 22.7°
Vertical: 17.1°

A smaller sensor captures a narrower field of view because it uses a smaller central area of the lens image.

Object Size at Minimum Focusing Distance

The product sheet provides the following reference object sizes at the minimum focusing distance:

2/3-inch sensor: 140.5 × 112.4 × 84.3 mm
1/2-inch sensor: 101.7 × 81.4 × 61.0 mm
1/3-inch sensor: 76.1 × 60.9 × 45.7 mm

The three values correspond to diagonal, horizontal, and vertical object coverage.

Actual results may vary with the camera’s active sensor dimensions, mechanical setup, focusing position, and measurement reference point.

Camera and Sensor Compatibility

The PMS-LFEHH-1228M(B) is designed for C-mount machine vision cameras with sensors up to 2/3 inch.

The product sheet provides angle-of-view and distortion data for:

• 2/3-inch sensors
• 1/2-inch sensors
• 1/3-inch sensors

Before confirming compatibility, check:

• Camera model
• Active sensor width and height
• Sensor optical format
• Camera resolution
• Pixel size
• C-mount interface
• Flange and adapter configuration
• Camera housing dimensions
• Filter requirements
• Illumination wavelength
• Available mechanical space

The 10MP rating does not guarantee compatibility with every 10MP camera. A small-pixel camera may require greater optical resolving performance than a camera with larger pixels and the same total resolution.

The wavelength range also does not confirm that every camera sensor will provide equal sensitivity across 420-1000 nm. Camera quantum efficiency and illumination wavelength should be checked separately.

Field of View and Working Distance Guidance

The actual field of view is determined by:

• Lens focal length
• Camera sensor dimensions
• Working distance
• Extension-ring thickness
• Camera aspect ratio
• Focusing position

For the same camera:

• Increasing the working distance increases the visible object area.
• Reducing the working distance decreases the visible object area.
• A 12mm lens captures a narrower area than an 8mm lens.
• A larger sensor captures a wider scene than a smaller sensor.
• Adding an extension ring can reduce the achievable working distance and change magnification.

The product sheet provides the following reference field-of-view values.

These values are reference data from the supplied product sheet. Final field of view should be confirmed using the actual camera, sensor dimensions, installation distance, and focusing condition.

For selection confirmation, provide POMEAS with:

• Camera model
• Sensor size
• Camera resolution
• Pixel size
• Available working distance
• Required horizontal field of view
• Required vertical field of view
• Smallest feature to inspect
• Required inspection accuracy

Recommended Applications

Electronic Component and Assembly Inspection

The 12mm focal length provides moderate scene coverage for checking connectors, terminals, fasteners, switches, assembled components, and defined PCB regions.

Its 10MP rating can support detailed imaging when matched to a suitable camera and field of view.

Application boundary: Very small solder defects, fine circuits, and microscopic features must be checked against the camera pixel size and actual object-side pixel resolution.

Label, Barcode, and Character Inspection

The lens may be used for labels, printed characters, serial numbers, date codes, and machine-readable codes.

Compared with a wider 8mm lens, the 12mm focal length can place more camera pixels across the label or code when the camera and working distance remain unchanged.

Application boundary: Barcode module size, character height, conveyor speed, exposure time, and lighting must be confirmed before readability can be guaranteed.

Part Positioning and Robot Guidance

The low published distortion values are relevant for detecting object edges, locating reference marks, checking orientation, and providing general position information.

Application boundary: Object-height changes can alter apparent size and position when using a conventional FA lens. Height-sensitive positioning may require telecentric or 3D imaging.

Packaging and Production Inspection

The lens can support inspection of package components, caps, labels, seals, inserted parts, and assembly completeness.

The 12mm focal length is suitable when a moderate production area must fit into one image without using an extremely wide viewing angle.

Application boundary: Large packages or wide conveyor sections may require a shorter focal length.

Visible and Near-Infrared Inspection

The specified 420-1000 nm range allows the lens to be considered for systems using visible or selected near-infrared illumination.

This can be relevant when different wavelengths are used to improve contrast between materials, coatings, printing, contamination, or surface features.

Application boundary: Focus shift, spectral transmission, camera sensitivity, and final image quality must be tested at the actual operating wavelength.

Selection Notes

Choose This 12mm Model When

• The camera sensor is 2/3 inch or smaller
• A 10MP lens rating is required
• The camera uses a C-mount interface
• A moderate field of view is needed
• An 8mm lens captures more background than required
• The available focusing distance is 0.15 m or greater
• Published distortion data is needed for system evaluation
• Visible or near-infrared illumination within 420-1000 nm is planned
• A compact Ø29 mm lens housing is preferred

Choose an 8mm Lens When

• A wider inspection area must fit into one image
• The camera must be positioned close to a large object
• Several objects or inspection zones must be captured together
• Pixel concentration on individual small features is less important
• The 12mm field of view is too narrow

Choose a Longer Focal Length When

• The required inspection area is smaller
• More camera pixels are needed on a small feature
• The camera can be installed farther from the object
• The inspected object occupies only a small part of the 12mm image
• A more concentrated field of view is required

When a Standard FA Lens Is Usually Sufficient

A conventional FA lens may be suitable for:

• Presence and absence inspection
• Label and code reading
• Assembly verification
• General surface inspection
• Component-position checks
• Robot guidance
• Packaging inspection
• Calibrated edge detection

When to Consider a Telecentric Lens

Consider a telecentric lens when:

• Dimensional measurement accuracy is the main objective
• Object height changes during inspection
• Magnification must remain stable across different depths
• Perspective error cannot be accepted
• Edge position must remain consistent
• The measurement tolerance is too strict for a conventional FA lens

When This Lens May Not Be Suitable

The PMS-LFEHH-1228M(B) may not be suitable when:

• The camera sensor is larger than 2/3 inch
• The camera does not have a compatible C-mount interface
• The required inspection area is significantly wider than the 12mm lens provides
• The required inspection area is very small and needs a longer focal length
• The required focusing distance is shorter than 0.15 m without an approved extension configuration
• High-accuracy measurement is required without calibration
• Object-height variation causes unacceptable perspective changes
• Identical optical performance across the entire 420-1000 nm range must be guaranteed
• A motorized focus or motorized iris is required

FAQ

Can the PMS-LFEHH-1228M(B) be used with a 2/3-inch camera?

Yes. The lens is specified for sensors up to 2/3 inch and provides published angle-of-view, object-size, and distortion data for this sensor format. The camera must use a compatible C-mount interface.

What field of view does the 12mm lens provide?

The field of view depends on sensor size and working distance. For example, the supplied data lists a 2/3-inch field of view of 143.47 × 119.25 mm at 200 mm working distance and 355.22 × 295.25 mm at 500 mm working distance.

How does this 12mm model differ from an 8mm lens?

At the same sensor size and working distance, the 12mm model provides a narrower field of view and places more camera pixels on a smaller inspection area. An 8mm lens is more suitable when wider scene coverage is required.

Is this lens suitable for dimensional measurement?

It may be used in a calibrated measurement system. The product sheet provides numerical distortion values, but it does not specify guaranteed measurement accuracy. Applications sensitive to object-height variation or perspective may require a telecentric lens.

How do I confirm selection or request a customized configuration?

Provide the camera model, sensor size, pixel size, working distance, required field of view, inspection object, wavelength, and accuracy target. POMEAS can review compatibility and confirm whether an extension ring or other customized configuration is technically available.

Request Lens Selection Support

To confirm whether the PMS-LFEHH-1228M(B) is suitable for your machine vision system, please provide:

Camera model
Sensor size
Camera resolution
Pixel size
Available working distance
Required field of view
Inspection object
Smallest feature to detect
Accuracy requirement
Illumination wavelength
Object height variation

POMEAS will review sensor coverage, expected field of view, object-side pixel resolution, wavelength requirements, and mechanical compatibility before recommending the final configuration.