50mm 1.1-Inch 20MP C-Mount FA Lens with M37x0.5 Filter Thread

PMS-LFPHM-5028M(C) is a 20MP fixed focal FA lens with 50mm focal length for 1.1-inch (17.6 mm) sensors, C-Mount, M37x0.5 filter thread, approximately 0.06% distortion and a 21.3 mm back focal length for long-distance small-target inspection.

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Product Overview

POMEAS PMS-LFPHM-5028M(C) is a 20-megapixel telephoto fixed focal FA industrial lens with a 50mm focal length for 1.1-inch (17.6 mm) sensors, C-Mount. It delivers a narrow field of view (19.9 x 15.9 x 11.9 degrees, diagonal x horizontal x vertical) with ultra-low distortion of approximately 0.06%, making it well suited to long-distance small-target inspection and precision positioning. The M37 x 0.5 filter thread and 21.3 mm back focal length simplify integration with filters and standard C-mount cameras.

PMS-LFPHM-5028M(C) white background

Key Features

20 MP high resolution for 1.1-inch sensors
50mm telephoto, narrow field of view 19.9° x 15.9° x 11.9° (D×H×V)
Ultra-low distortion of approximately 0.06%
Back focal length 21.3 mm
M37 x 0.5 filter thread
Maximum aperture F2.8
C-Mount

Technical Specifications

Model	PMS-LFPHM-5028M(C)
Product Type	Fixed Focal Machine Vision FA Lens
Resolution	20MP
Maximum Sensor Format	1.1 inch
Effective Image Size	17.6 mm
Focal Length	50 mm
Lens Mount	C-Mount
Maximum Aperture	F2.8
Distortion	~0.06%
Back Focal Length	21.3 mm
Filter Thread	M37 × 0.5 mm
Angle of View (D×H×V)	19.9° × 15.9° × 11.9°
Focus Control	Manual
Iris Control	Manual

Applications

Ideal for long-distance appearance inspection, small-target defect detection, precision positioning and measurement tasks that require a narrow field of view and high geometric accuracy on 1.1-inch or smaller sensors.

FAQ

How does the PMS-LFPHM-5028M(C) differ from the 5028M(B)?

The (C) version provides a 21.3 mm back focal length and an M37 x 0.5 filter thread, while the (B) version specifies a 10.3 mm optical back focal length and an M37 x 0.75 front thread. Both are 50mm 20MP lenses for 1.1-inch sensors.

How low is the distortion?

Distortion is approximately 0.06%, enabling high geometric accuracy for measurement-oriented inspection tasks.

What is the field of view?

The published angle of view is 19.9° diagonal x 15.9° horizontal x 11.9° vertical, giving a narrow telephoto field for small targets at longer working distances.