Best C-Mount Extension Tube Adapters for CCTV Cameras
Choosing a C-Mount extension tube or spacer can simplify lens setup, expand macro capabilities, and improve focus on CCTV and industrial cameras. This guide highlights five reliable options, comparing their sizes, compatibility, and build quality to help you select the right adapter for CS or C mounts. Each product is evaluated on materials, available lengths, and practical use cases to support clear, precise imaging in surveillance and professional environments.
| Product | Brand | Key Spec | Coverage |
|---|---|---|---|
| Camera C-Mount Lens Adapter ZCZQC 5mm | Unknown | 5mm extension, Aluminum | C to CS for CCTV |
| 1mm to 50mm C-Mount to CS Extension Tube | Unknown | Multiple options, CS mount | All-in-one range |
| C-Mount Extension Tube Adapter C-CS (40mm) | LingoFoto Store | 40mm, Aluminum | C to CS |
| C-Mount Extension Tube Adapter C-CS (20mm) | LingoFoto Store | 20mm, Aluminum | C to CS |
| Evertech 4pcs 5mm Extension Tube | Evertech Store | 5mm, Aluminum | C to CS |
Below are concise, objective descriptions of five options that align with common C-to-CS mounting needs. Each entry includes an image, a direct Amazon link, and the core features to help you compare at a glance.
Camera C-Mount Lens Adapter ZCZQC 5mm C to CS

Material and build: Aluminum construction offers sturdiness and durability with a smooth, clear thread to minimize wear. The finish emphasizes precise machining, reducing wobble in tight camera-lens assemblies. Its simple 5 mm extension suits surveillance setups needing a modest distance increase between lens and body. The adapter supports C-to-CS mounting, expanding compatibility for CS-mount cameras used in CCTV systems. Typical applications include surveillance cameras and industrial imaging where compact, reliable spacers are essential.
C-Mount To CS 1mm–50mm Extension Tube Set

This versatile extension tube set converts a C-Mount lens to CS-mount use. It includes multiple selectable lengths (1 mm, 2 mm, 5 mm, up to 50 mm), enabling precise control of working distance and depth of field. The kit is intended for CCTV cameras and other CCTV-ready devices, providing a straightforward way to adapt existing lenses to CS-mount bodies without additional complicated hardware. Ideal for users who need to experiment with focus and magnification across varying shooting distances.
C-CS 40mm Extension Tube Adaptor

Brand: LingoFoto Store. Material: Aluminum, delivering a robust, lightweight spacer for C-to-CS conversions. The 40 mm option provides a substantial extension for macro or telephoto adjustments in CCTV environments. The adapter enables CS-mount cameras to accept C-mount lenses by providing a stable, threaded interface. It is designed for typical CCTV configurations, including surveillance installations in commercial or industrial settings.
C-CS 20mm Extension Tube Adaptor

Brand: LingoFoto Store. This 20 mm spacer is part of an eleven-size range aimed at C-to-CS conversions. It serves users who need a moderate extension to fine-tune focus and magnification in CCTV or industrial cameras. The extension tube helps decrease object distance and increase image distance, effectively altering perspective and depth of field. The kit is compatible with most C-mount lenses on CS-mount cameras, creating versatile imaging setups.
Evertech 4-Piece 5mm Extension Tube Kit

Brand: Evertech Store. Kit includes a 5 mm extension tube designed to convert C-mount lenses for CS-mount cameras. The 5 mm spacer is a common choice for mild focus adjustments and macro work in CCTV installations. The aluminum construction emphasizes durability while maintaining a light profile suitable for portable setups. This option is suitable for users who require a straightforward, reliable C-to-CS conversion with a dedicated 5 mm extension.
Buying Guide: Key Purchase Considerations
- Mount compatibility: Verify C-to-CS or CS-to-C requirements for your camera and lens. Mis-matched mounts can prevent proper attachment or degrade image quality.
- Extension length: Short extensions (1–5 mm) are ideal for minimal focus shifts; longer extensions (10–50 mm) enable macro work or significant working-distance changes. Consider your subject distance and desired magnification.
- Material and finish: Aluminum is common, offering durability with light weight. Look for smooth threads and precise machining to reduce wear and ensure secure fits.
- Size and fit: Outer and inner diameters must align with your lens diameter and camera body to avoid vignetting or looseness.
- Brand and compatibility: Some kits provide multiple lengths in one package, which is convenient for experimenting with focus before committing to a specific length.
- Use case diversity: For surveillance and industrial cameras, prioritize stability, consistent thread engagement, and corrosion resistance to survive long-term deployments.
In sum, selecting a C-mount extension tube or spacer depends on the desired working distance, lens compatibility, and the camera system you use. Aluminum adapters with a range of available lengths offer flexibility for macro work, focal length adjustments, and improved imaging in CCTV environments. When evaluating options, consider how often you will adjust extension length, the working distances involved, and the environmental conditions of the installation.