12mm 4/3-Inch 10MP Wide-Angle C-Mount Lens | POMEAS

12mm 10MP Wide-Angle C-Mount Lens for 4/3-Inch Cameras

The POMEAS PMS-LFHHH-1220M is a 12mm fixed focal FA lens designed for C-mount machine vision cameras with sensors up to 4/3 inch. It is rated for 10MP imaging and provides a Ø22 mm image circle, an adjustable F2.0-F22 manual iris, and separate locking mechanisms for focus and aperture adjustment.

Its combination of a short 12mm focal length and large 4/3-inch sensor coverage produces a wide field of view. This makes the lens suitable for inspection systems that need to capture large objects, wide conveyor areas, trays, assemblies, or multiple components in one image.

The lens can also be used with smaller compatible sensors, including 1-inch formats. Actual field of view, object-side pixel resolution, and inspection capability must be confirmed using the selected camera, working distance, pixel size, and required feature dimensions.

Key Features

Supports Sensors up to 4/3 Inch

The PMS-LFHHH-1220M is specified for sensors up to 4/3 inch and provides a Ø22 mm image circle.

This large-format coverage makes it suitable for machine vision cameras that require a larger image circle than conventional 1-inch or 2/3-inch lenses can provide.

The lens may also be used with smaller sensors when the camera has a compatible C-mount interface. A smaller sensor captures a reduced central portion of the lens image and therefore provides a narrower field of view at the same working distance.

12mm Focal Length for Wide-Area Inspection

The 12mm focal length provides a wide viewing angle when paired with a 4/3-inch sensor.

This can help when:

• A large object must fit into one image

• A wide conveyor or production area must be monitored

• Several components must be inspected simultaneously

• Camera installation distance is limited

• A large-format sensor is needed to capture more scene information

Because the camera pixels are distributed across a larger object area, very small defects may require a narrower field of view, a longer focal-length lens, or a higher-resolution camera.

10MP Resolution Rating

The lens is rated for 10MP machine vision imaging.

This rating should be evaluated together with the camera sensor size and pixel pitch. Two cameras with the same megapixel count may have different sensor dimensions and pixel sizes, placing different resolving demands on the lens.

Before confirming selection, review:

• Active sensor dimensions

• Pixel size

• Required field of view

• Smallest feature to detect

• Required inspection accuracy

Ø22 mm Image Circle

The specified Ø22 mm image circle supports the stated 4/3-inch sensor format.

Image-circle diameter is important when matching a lens to a large sensor. A lens with insufficient image coverage may produce dark corners, reduced edge quality, or incomplete sensor coverage.

The actual active sensor diagonal of the selected camera should still be confirmed before ordering.

F2.0-F22 Manual Iris

The adjustable F2.0-F22 iris allows the integrator to balance image brightness, exposure time, and depth of field.

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

The final aperture should be selected together with:

• Camera exposure time

• Object speed

• Illumination intensity

• Required depth of field

• Acceptable image sharpness

Focus and Iris Locking Mechanisms

Both the focus and aperture adjustments include locking mechanisms.

After focus and iris settings have been established, they can be secured to help reduce accidental movement during machine installation, maintenance, camera handling, or production operation.

This is useful for fixed inspection stations that require stable and repeatable imaging settings.

Published Field-of-View Angles

The product sheet provides complete diagonal, horizontal, and vertical angle-of-view data for both 4/3-inch and 1-inch sensors.

For a 4/3-inch sensor:

• Diagonal: 89°

• Horizontal: 75.5°

• Vertical: 61.1°

For a 1-inch sensor:

• Diagonal: 68.9°

• Horizontal: 57.3°

• Vertical: 44.2°

These values show that the 4/3-inch sensor captures a substantially wider scene than the 1-inch sensor when the lens and working distance remain unchanged.

Published Distortion Data

The product sheet specifies:

• 4/3-inch sensor: -2.4% at y = 11.0 mm

• 1-inch sensor: -1.78% at y = 8.0 mm

The negative values indicate barrel-type geometric distortion at the stated image heights.

For presence inspection, packaging verification, robot guidance, and general image recognition, this may be acceptable depending on the application. For coordinate positioning or dimensional measurement, distortion correction and camera calibration should be considered.

Published lens distortion is not the same as guaranteed system measurement accuracy.

Technical Specifications

Model: PMS-LFHHH-1220M
Lens Type: Fixed focal machine vision FA lens
Resolution Rating: 10MP
Focal Length: 12 mm
Maximum Sensor Format: 4/3 inch
Image Circle: Ø22 mm
Aperture Range: F2.0-F22
Camera Mount: C-Mount
Filter Thread: M77 × 0.75 mm
Back Focal Length in Air: 18.93 mm
Focus Adjustment: Manual, with locking mechanism
Iris Adjustment: Manual, with locking mechanism
Operating Temperature: -10°C to +50°C

Angle of View

4/3-Inch Sensor

Diagonal: 89°
Horizontal: 75.5°
Vertical: 61.1°

1-Inch Sensor

Diagonal: 68.9°
Horizontal: 57.3°
Vertical: 44.2°

The actual linear field of view in millimeters depends on the camera sensor dimensions and installation distance.

Distortion

4/3-inch sensor: -2.4% at y = 11.0 mm
1-inch sensor: -1.78% at y = 8.0 mm

Applications involving geometric measurement, coordinate positioning, or edge-based dimensional inspection should use calibration and distortion correction where required.

Camera and Sensor Compatibility

The PMS-LFHHH-1220M is designed for C-mount cameras with sensors up to the specified 4/3-inch format.

It may also be used with smaller compatible sensors, including 1-inch formats. When used with a smaller sensor, the camera records a smaller central area of the lens image and captures a narrower field of view.

Before confirming compatibility, check:

• Camera model

• Active sensor width and height

• Sensor diagonal

• Camera resolution

• Pixel size

• C-mount interface

• Camera flange configuration

• Camera housing dimensions

• Available space around the lens barrel

• Filter requirements

• Illumination wavelength

The large Ø80 mm front section and M77 filter thread require more installation space than many compact FA lenses. Mechanical interference with lighting, brackets, covers, or nearby equipment should be checked in advance.

The 10MP rating does not automatically guarantee compatibility with every 10MP camera. Sensor dimensions and pixel size must also match the required inspection detail.

Field of View and Working Distance Guidance

The actual field of view is determined by:

• Lens focal length

• Camera sensor dimensions

• Working distance

• Sensor aspect ratio

• Focusing position

For the same lens:

• A 4/3-inch sensor captures a wider scene than a 1-inch sensor.

• Increasing the working distance increases the visible object area.

• Reducing the working distance decreases the visible object area.

• A shorter focal length provides wider coverage than a longer focal length.

• A wider field of view distributes the available camera pixels across a larger object area.

The product sheet does not provide a confirmed focusing range or a table of linear field-of-view values at specific working distances.

To confirm the actual inspection area, provide POMEAS with:

• Camera model

• Active sensor size

• Camera resolution

• Pixel size

• Available working distance

• Required horizontal field of view

• Required vertical field of view

• Smallest inspection feature

• Required accuracy

POMEAS can then calculate or test whether the 12mm focal length provides the required coverage and object-side pixel resolution.

Recommended Applications

Large-Object and Packaging Inspection

The wide viewing angle can help capture cartons, trays, containers, packages, labels, caps, seals, and multiple packaging features within one image.

This configuration is useful when overall presence, orientation, label position, package completeness, or visible defects must be checked across a large area.

Application boundary: Small characters, fine barcode modules, and minor defects must be evaluated against the total field of view and camera pixel size.

Wide Conveyor Inspection

The 12mm focal length and 4/3-inch sensor coverage can support inspection of a wide conveyor section or multiple products moving through the same imaging area.

Application boundary: Conveyor speed, exposure time, motion blur, lighting intensity, and spacing between products must be considered separately.

Assembly and Multi-Component Verification

The lens can capture a large assembly or several components in one image, supporting checks for presence, orientation, completeness, and general position.

Application boundary: When individual components are very small, a longer focal length or separate inspection station may provide more pixels on each feature.

Robot Guidance and Part Localization

The wide field of view can help locate parts across a large pickup, loading, sorting, or positioning area.

Application boundary: Wide-angle imaging introduces perspective effects, and the published distortion values should be considered. Height-sensitive positioning may require calibration, 3D imaging, or telecentric optics.

Large Surface Inspection

With suitable illumination, the lens may support inspection of scratches, contamination, missing material, print defects, or visible surface anomalies across a large object area.

Application boundary: A wide field of view reduces the number of pixels available for each defect. Small or low-contrast defects may require a smaller field, more camera resolution, or specialized lighting.

Selection Notes

Choose This 12mm 4/3-Inch Model When

• A 4/3-inch or smaller C-mount sensor is being used

• A Ø22 mm image circle is required

• A wide inspection area must fit into one image

• A 10MP lens rating matches the camera requirement

• The camera installation distance is limited

• Several components or products must be captured simultaneously

• Manual focus and iris locking are required

• A large-format wide-angle lens is preferred

Choose a Longer Focal Length When

• The 12mm field of view is wider than required

• The inspection object occupies only a small part of the image

• More camera pixels are required on a small feature

• Perspective appearance should be reduced by increasing camera distance

• Unnecessary background should be removed from the image

When a Standard FA Lens Is Usually Sufficient

A conventional FA lens may be suitable for:

• Presence and absence inspection

• Packaging verification

• Label-position checks

• Assembly completeness

• General surface inspection

• Robot guidance

• Part localization

• Wide-area monitoring

When to Consider a Telecentric Lens

A telecentric lens should be considered when:

• Dimensional measurement accuracy is the main objective

• Object height changes during inspection

• Magnification must remain stable at different depths

• Perspective error cannot be accepted

• Edge position must remain consistent

• The specified distortion is too high for the required tolerance

When This Lens May Not Be Suitable

The PMS-LFHHH-1220M may not be suitable when:

• The camera sensor is larger than the stated 4/3-inch format

• The camera does not use a compatible C-mount interface

• The required inspection area is much smaller than the available field of view

• Very small defects must be detected across a very large object area

• Strict dimensional measurement is required without calibration

• Object-height variation creates unacceptable perspective changes

• Installation space cannot accommodate the Ø80 mm front structure

• A confirmed minimum focusing distance is required before mechanical design

• A motorized focus or motorized iris is required

• Spectral transmission must be guaranteed for a specific wavelength

FAQ

Can the PMS-LFHHH-1220M be used with a 4/3-inch camera?

Yes. The lens is specified for sensors up to 4/3 inch and provides a Ø22 mm image circle. The camera must also use a compatible C-mount interface.

Can it be used with a 1-inch sensor?

Yes. The product sheet provides field-of-view and distortion data for a 1-inch sensor. At the same working distance, the 1-inch sensor captures a narrower scene than a 4/3-inch sensor.

What field of view will the 12mm lens provide?

The exact linear field of view depends on the active sensor dimensions and working distance. The product sheet provides angular field-of-view values but does not provide verified object coverage in millimeters at specific distances.

Why is the field of view wider on a 4/3-inch sensor?

A larger sensor captures a larger portion of the lens image circle. With the same lens and working distance, this results in wider horizontal, vertical, and diagonal coverage.

Is the lens suitable for dimensional measurement?

It may be used in a calibrated system after the complete camera and lens configuration has been tested against the required tolerance. The published distortion is -2.4% on a 4/3-inch sensor and -1.78% on a 1-inch sensor. For strict dimensional measurement, a telecentric lens may be more appropriate.

How is this model different from a 12mm lens for a 2/3-inch sensor?

This model supports a larger 4/3-inch sensor and provides a Ø22 mm image circle. When used with the larger sensor, it captures a substantially wider scene than a 12mm lens designed only for 2/3-inch formats.

How can I confirm whether the lens matches my camera?

Provide the camera model, active sensor dimensions, resolution, pixel size, C-mount details, working distance, required field of view, and smallest inspection feature to POMEAS for confirmation.

Request Lens Selection Support

Please provide POMEAS with:

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

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