Lensation Lens, BM4218, 4.2 mm, 1/3″

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:

• Click here to download BM4218 Datasheet (Insert correct URL to file once hosted)

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