4.2mm Tapered Cone Lens

Product Brief Description

This compact wide angle lens is manufactured by ShangHai SILK Optical Technology CO., LTD, tailored for 1/2.7‑inch image sensors for industrial and surveillance imaging tasks. As a high‑performance optical lens, it delivers a large diagonal field‑of‑view of 124°, bringing broad scene coverage for real‑time image capture. Featuring fixed focal design and M12 mount, this industrial camera lens owns compact overall dimension with total track length only 10.9mm, easy for embedding into small‑size imaging devices. Its F3.5 aperture balances light intake and optical performance, while controlled CRA value ensures good compatibility with mainstream CMOS sensors. ShangHai SILK Optical Technology CO., LTD strictly controls every production procedure, making this cctv lens stable for long‑time continuous operation. It strikes a fine balance between wide‑angle coverage and practical imaging quality, suitable for various space‑limited vision equipment, and offers reliable optical solution for different civilian and industrial visual‑recording scenarios.

Detailed Product Description

Parameter Analysis

‑ Optical Structure & Dimension: Manufactured by ShangHai SILK Optical Technology CO., LTD, this wide angle lens adopts mature optical layout. Total track length is 10.9±0.3mm, compact size facilitates device miniaturization. Effective focal length reaches 4.2mm with ±5% tolerance, working with F/NO 3.5±5% aperture to realize balanced light‑gathering capacity. Back focal length is 3.2±0.2mm, supporting convenient sensor assembly.

‑ Imaging Format & Field of View: Max image circle Φ7.0mm matches 1/2.7" sensor perfectly. Diagonal FOV 124°, horizontal FOV 94°, vertical FOV 45.6°, this M12 lens realizes ultra‑wide scene capturing without extra mechanical rotation.

‑ Imaging Index: TV distortion‑19.30%, relative illumination 45.0%, CRA＜14.13°. Low CRA greatly reduces shading risk for CMOS chips. Standard M12*P0.5 mount ensures universal interchangeability for machine vision lens installation.

Performance Advantages

Ultra‑wide viewing capability: As a fixed focal lens, it supplies broad field‑of‑view, one‑shot captures large monitoring area, cuts hardware cost for multi‑camera deployment.

Low CRA design: This high‑performance optical lens keeps chief ray angle below14.13°, greatly improves peripheral imaging uniformity, reduces dark corner issue for surveillance lens application.

Miniature mechanical design: Short TTL structure fits compact equipment shell, ideal for small‑form‑factor camera hardware. Standard M12 interface brings good compatibility with most industrial camera modules.

Stable mass‑production quality: Supported by ShangHai SILK Optical Technology CO., LTD’s optical engineering capacity, this cctv lens keeps tight tolerance on each optical parameter, guarantees consistent batch performance.

Application Fields

‑ Surveillance & security monitoring: This wide angle lens fits small‑size security cameras, covers wide indoor and short‑range outdoor monitoring scenes.

‑ Machine vision & industrial inspection: The industrial camera lens works for compact visual inspection equipment, provides broad‑angle imaging for product checking, code scanning.

‑ Smart home devices: Used for smart door camera, household monitoring cameras, compact body adapts to limited inner space of smart hardware.

‑ IoT visual terminals: Applied in various IoT visual collection modules, this fixed focal lens offers reliable wide‑angle optical solution for edge‑side image acquisition.