35mm 1-Inch 5MP Low-Distortion C-Mount Lens | POMEAS

35mm 5MP C-Mount FA Lens for 1-Inch Cameras

The POMEAS PMS-LFGH-3514M is a 35mm machine vision lens designed for C-mount cameras with sensors up to 1 inch. It is rated for 5MP imaging and provides an adjustable F1.4-F22 iris, a published focusing range of 0.3 m to infinity, and separate locking controls for focus and aperture.

Its 35mm focal length produces a narrower field of view than shorter focal-length lenses used with the same camera and installation distance. This makes it suitable for systems that need to concentrate more camera pixels on a relatively small inspection area without positioning the camera extremely close to the object.

Typical uses include electronic component inspection, label and code reading, assembly verification, part-position checks, and surface inspection. Final selection should be based on the camera sensor dimensions, pixel size, required field of view, installation distance, object height variation, and inspection accuracy.

Key Features

Supports Sensors up to 1 Inch

The lens is specified for a maximum 1-inch sensor format, with a 12.8 × 9.6 mm active area and a Ø16 mm image circle. It can also be used with smaller sensor formats when the camera has a compatible C-mount interface.

Using a smaller sensor captures a smaller central portion of the image circle and results in a narrower field of view at the same installation distance.

35mm Focal Length for a Concentrated Inspection Area

The 35mm focal length is suitable when the required inspection area is smaller than the view provided by shorter focal-length lenses.

At the same sensor size and object distance, a 35mm lens shows less of the scene and places more of the camera’s available pixels across the selected inspection region. This can be useful for inspecting individual components, labels, connectors, terminals, or defined assembly areas.

5MP Lens Resolution Rating

The PMS-LFGH-3514M is rated for 5MP machine vision imaging.

Compatibility should not be judged by megapixel count alone. Cameras with the same resolution can have different sensor dimensions and pixel sizes. The sensor size, pixel pitch, smallest detectable feature, and required inspection accuracy should all be reviewed before confirming the lens.

F1.4-F22 Adjustable Iris

The manual F1.4-F22 aperture allows the integrator to balance image brightness, exposure time, and depth of field.

A wider aperture can provide more light when exposure time is limited. A smaller aperture can increase depth of field when the inspected object has moderate height variation. The final aperture should be selected together with the illumination intensity and camera exposure settings.

Focus and Iris Locking Screws

Separate locking screws allow the focus and iris settings to be secured after adjustment.

This helps reduce accidental changes during equipment installation, maintenance, camera repositioning, or routine operation. The locking controls are especially useful in fixed machine vision stations where consistent imaging settings are required.

Published Low Distortion Values

The product sheet specifies distortion of -0.07% at y = 5.5 mm and -0.06% at y = 4.0 mm.

These values are useful when evaluating the lens for positioning, edge detection, and geometry-sensitive inspection. For dimensional measurement, the complete camera and lens system should still be calibrated and validated against the required tolerance.

Technical Specifications

Model: PMS-LFGH-3514M

Lens Type: Fixed-focal-length machine vision FA lens

Resolution Rating: 5MP

Focal Length: 35 mm

Maximum Sensor Format: 1 inch

Maximum Sensor Area: 12.8 × 9.6 mm

Image Circle: Ø16 mm

Aperture Range: F1.4-F22

Focusing Range: 0.3 m to infinity

Distortion: -0.07% at y = 5.5 mm; -0.06% at y = 4.0 mm

Back Focal Length: 12.82 mm

Camera Mount: C-Mount

Filter Thread: M37.5 × 0.5 mm

Angular Coverage on 1-Inch Sensor: 18.2° × 14.1°

Angular Coverage on 2/3-Inch Sensor: 12.9° × 9.6°

Operating Temperature: -10°C to +50°C

Operating Humidity: 30%-80%, non-condensing

Focus Control: Manual, lockable

Iris Control: Manual, lockable

Camera and Sensor Compatibility

The PMS-LFGH-3514M is designed for sensors up to the specified 1-inch format. The product data lists a maximum active area of 12.8 × 9.6 mm and an image circle of Ø16 mm.

The lens may also be used with smaller sensor formats, including 2/3-inch sensors, provided that the camera uses a compatible C-mount interface.

Before confirming compatibility, check the following camera information:

• Actual active sensor width and height
• Sensor optical format
• Camera resolution
• Pixel size
• Lens mount
• Flange and adapter configuration
• Camera housing dimensions
• Clearance around the focus and iris locking screws
• Required illumination wavelength

A camera being rated at 5MP does not automatically confirm optical compatibility. A small-pixel 5MP camera may require more lens resolving capability than a larger-pixel camera with the same total resolution.

Cameras larger than the specified 1-inch format should not be used unless sensor coverage and image-circle compatibility are separately confirmed.

Field of View and Focusing Guidance

The field of view is determined by focal length, sensor dimensions, and the distance between the camera and the inspected object.

For the same camera and object distance:

• A 35mm lens provides a narrower field of view than a shorter focal-length lens.
• A 1-inch sensor captures a wider area than a smaller sensor.
• Increasing the object distance increases the visible inspection area.
• Reducing the object distance decreases the visible area.

The published focusing range is 0.3 m to infinity. This is a focusing specification and should not automatically be treated as a guaranteed working distance measured from the front of the lens.

The product sheet provides the following angular coverage values:

• 1-inch sensor: 18.2° × 14.1°
• 2/3-inch sensor: 12.9° × 9.6°

These angular values should not be used as guaranteed linear field-of-view dimensions. To confirm the actual field of view in millimeters, provide:

• Camera model
• Active sensor size
• Camera resolution
• Pixel size
• Available installation distance
• Required horizontal field of view
• Required vertical field of view
• Smallest inspection feature
• Required inspection accuracy

POMEAS can then evaluate whether the 35mm focal length provides the required coverage.

Recommended Applications

Electronic Component and Connector Inspection

The narrower field of view can help concentrate camera pixels on connectors, terminals, switches, solder areas, and individual electronic components.

This lens is most appropriate when the inspection area is controlled and the component remains within the available depth of field. Significant height variation may require a smaller aperture, additional lighting, or a different optical configuration.

Label, Barcode, and Character Inspection

The 35mm focal length can be used for labels, printed characters, serial numbers, and machine-readable codes when the camera must be positioned away from the inspected area.

The code module size, character height, sensor pixel size, motion speed, exposure time, and lighting must be checked before confirming readability.

Assembly and Part-Presence Verification

The lens can support inspection of fasteners, caps, seals, inserted components, connector positions, and assembly completeness.

The focus and iris locking screws help maintain the adjusted imaging condition after equipment setup. Applications with a very large inspection area may require a shorter focal-length lens.

Surface and Edge Inspection

With suitable illumination, the lens may be used to inspect scratches, contamination, missing material, surface marks, and edge conditions on relatively flat objects.

The lens does not create defect contrast by itself. Ring, bar, coaxial, dome, or backlighting should be selected according to the surface material and defect type.

Positioning and Feature Location

The published distortion values make the lens relevant for systems that locate edges, holes, marks, or component positions.

For coordinate measurement or positioning with a strict tolerance, camera calibration and real-system accuracy validation are still required.

Selection Notes

Choose the 35mm Lens When

• The required inspection area is relatively small.
• The camera cannot be installed very close to the object.
• More camera pixels need to be concentrated on a defined region.
• The camera sensor is 1 inch or smaller.
• The camera uses a compatible C-mount interface.
• The published focusing range of 0.3 m to infinity matches the installation.

Choose a Shorter Focal Length When

• A wider object area must fit into one image.
• Several components must be inspected simultaneously.
• The available camera distance is limited.
• The 35mm lens produces a field of view that is too narrow.
• Large products or wide conveyor areas must be covered.

When a Standard FA Lens Is Usually Sufficient

A conventional FA lens such as the PMS-LFGH-3514M may be sufficient for:

• Presence and absence inspection
• Label and code reading
• Surface defect detection
• Assembly verification
• General edge detection
• Part positioning
• Inspection of relatively flat objects

When to Consider a Telecentric Lens

A telecentric lens should be considered when:

• Dimensional measurement accuracy is the main requirement.
• The object height changes during inspection.
• Perspective error cannot be accepted.
• Magnification must remain stable as the object moves in depth.
• Edge position must remain consistent across different object heights.
• The measurement tolerance is too strict for a conventional FA lens.

When This Lens May Not Be Suitable

The PMS-LFGH-3514M may not be the appropriate choice when:

• The camera sensor is larger than 1 inch.
• The camera does not have a compatible C-mount interface.
• The required inspection area is too wide for a 35mm focal length.
• The required focus distance is shorter than the published 0.3 m range.
• The application requires verified performance beyond the stated 5MP rating.
• The inspection requires constant magnification across different object heights.
• High-accuracy dimensional measurement is required without calibration.
• The required spectral range or illumination wavelength has not been confirmed.

FAQ

Can the PMS-LFGH-3514M be used with a 1-inch camera?

Yes. The lens is specified for sensors up to 1 inch, with a maximum sensor area of 12.8 × 9.6 mm and a Ø16 mm image circle. The camera mount, pixel size, and required image quality should still be confirmed.

Can it be used with a 2/3-inch sensor?

Yes, provided that the camera has a compatible C-mount interface. A 2/3-inch sensor uses a smaller central portion of the image circle and produces a narrower field of view than a 1-inch sensor at the same object distance.

Does it work with every 5MP camera?

Not necessarily. Cameras with the same megapixel count may use different sensor sizes and pixel pitches. The camera’s active sensor dimensions, pixel size, required feature resolution, and mount must be checked.

What field of view will the 35mm lens provide?

The exact field of view depends on the camera sensor dimensions and object distance. The supplied data provides angular coverage, but not a verified linear field of view in millimeters. Provide the sensor size and installation distance for calculation or testing.

How is a 35mm lens different from a shorter focal-length lens?

At the same sensor size and object distance, the 35mm lens provides a narrower field of view. It places more of the camera’s pixels across a smaller inspection region. A shorter focal length is more suitable when a wider area must fit into one image.

Is this lens suitable for dimensional measurement?

It may be used for calibrated measurement where the system has been tested against the required tolerance. The sheet provides published distortion values, but it does not specify guaranteed measurement accuracy. For object-height variation or strict metrology, a telecentric lens may be more appropriate.

Can the lens be customized?

Customization is not specified in the supplied product data. Submit the required mount, wavelength, mechanical dimensions, field of view, or other special requirements to POMEAS for technical confirmation.

Request Lens Selection Support

To confirm whether the PMS-LFGH-3514M is suitable for your machine vision system, please provide:

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

POMEAS will review the sensor coverage, field of view, pixel resolution, optical interface, and application conditions before recommending the final lens configuration.