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Lensation Lens, BM4218, 4.2 mm, 1/3″

$ 92.69

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Lensation BM4218 – 4.2 mm High-Intensity S-Mount Lens for 1/3″ Sensors

The Lensation BM4218 is a premium S-Mount (M12) lens engineered for sensors up to 1 megapixel with a 1/3-inch image format. Designed for high performance in low-light environments, this lens features an ultra-bright F1.8 aperture, fixed focus, and a compact form factor. With its wide 89° diagonal field of view, the BM4218 is ideal for embedded vision, robotics, smart surveillance, and machine learning applications.


Product Specifications

  • Model: BM4218

  • Brand: Lensation

  • Mount: S-Mount (M12)

  • Focal Length: 4.2 mm

  • Aperture: F1.8 (Fixed Iris)

  • Sensor Compatibility: Up to 1/3” format (1–2 MP)

  • Field of View:

    • Diagonal: 89°

    • Horizontal: 71°

    • Vertical: 49.5°

  • Minimum Object Distance (MOD): 0.2 m

  • Back Focal Length: 7.21 mm

  • IR Correction: Yes

  • Optical Distortion: -29%

  • Weight: 5.4 g

  • Focus: Fixed

  • Iris: Fixed

  • Chief Ray Angle: 8.8°


Key Benefits

  • Exceptional Light Sensitivity with a wide F1.8 aperture

  • Wide Field of View – Suitable for close-range embedded vision

  • IR-Corrected Optics – Accurate imaging in both visible and infrared spectrums

  • Fixed Focus Design – Optimized for robust, maintenance-free integration

  • Compact and Lightweight – Perfect for drones, robotics, and industrial IoT devices


Download Datasheet

Get the full technical details and mechanical drawings in the official PDF:


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Additional information

Lens Resolution (MPix)

Lens Focal Length (mm)

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