Fixed-focus camera objective TECHSPEC® C

alignmentinspectionmachine vision

Overview
TECHSPEC® C Series Fixed Focal Length Lenses are compact C‑mount imaging lenses engineered for machine vision, factory automation and inspection. They balance resolution, working distance and compact form factor for space‑constrained industrial systems.

Key Features

• Supports up to 2/3" sensor formats
• Compatible with sensors up to 7.5 MP (≈2.8 µm pixel size)
• Compact C‑mount package optimized for machine vision
• Focal lengths from 3.5 mm to 100 mm
• Large maximum apertures to maintain throughput in low light
• 425–675 nm BBAR broadband anti‑reflection coating
• Locking iris and focus with recessed set screws
• Ruggedized mechanical housing manufactured to tight tolerances

Product Family Description
TECHSPEC® C Series lenses combine optical performance and industrial features in a compact form factor to address automated inspection, alignment, identification and vision‑guided robotics. Tight manufacturing tolerances reduce lens‑to‑lens variation and simplify multi‑camera deployments and camera replacement on production lines.

Available Sub‑Families (optomechanical variations)

• C Series: Adjustable version with locking cam focus and iris adjustment
• Ci Series: Fixed aperture, compact housing and locked focus for increased ruggedization
• Cr Series: Optics glued with locking C‑clamp focus ring for stabilized ruggedization
• Cx Series: Modular mechanics allowing disassembly for accessory integration (liquid lenses, apertures)
• Liquid Lens Cx Series: Integrated liquid lens for fast electronic autofocus
• Cw Series: Waterproof versions meeting ingress protection standards (e.g., IPX7/IPX9K)

Common Specifications

• Product Family: C Series
• Iris Option: Variable (locking option)
• Coating: 425–675 nm BBAR
• Pixel Size (µm): 2.74 (common reference)
• Mount: C‑Mount
• Focal Length Range: 3.5 mm – 100 mm
• Sensor Support: up to 2/3"; up to 7.5 MP depending on model

Technical Table (Focal Length vs. Mechanical Dimensions)
Focal Length | A | B | C | D
3.5 mm | 50.0 mm | 39.3 mm | 32.0 mm | 2.72 mm
4.5 mm | 40.0 mm | 37.5 mm | 32.0 mm | 2.78 mm
6.0 mm | 36.0 mm | 48.9 mm | 35.8 mm | 1.4 mm
8.5 mm | 32.0 mm | 34.5 mm | 32.0 mm | 0.0 mm
12 mm | 32.0 mm | 27.9 mm | 32.0 mm | 0.5 mm
16 mm | 33.0 mm | 40.5 mm | 33.0 mm | 1.0 mm
25 mm | 31.0 mm | 30.5 mm | 31.0 mm | 1.3 mm
35 mm | 33.0 mm | 41.0 mm | 33.0 mm | 0.0 mm
50 mm | 35.8 mm | 53.7 mm | 35.8 mm | 2.85 mm
100 mm | 52.0 mm | 93.5 mm | 41.0 mm | 7.0 mm

Applications and Integration Notes
Designed for visible‑spectrum machine vision systems requiring high resolution and compact packaging. Typical uses: high‑speed inspection, vision‑guided robotics, barcode reading, measurement and gauging. Locking iris and focus with recessed set screws support stable setup retention after integration.