Marshall - 7 mm to 34 mm - f/0.95 - f/1 - Varifocal Lens for CS Mount

Engineered for professional security installations, this Marshall varifocal CS-mount lens delivers exceptional image clarity across a broad focal range. From wide-area surveillance to close-up identification, the 7-34 mm zoom, paired with a fast aperture, provides bright, high-contrast footage in challenging lighting while giving you precise control over field of view. Designed to integrate seamlessly with a wide range of CCTV and IP cameras, this lens stands out as a versatile solution for security systems that demand reliability, flexibility, and superior image quality. Whether you’re monitoring an entrance, hallway, parking lot, or loading dock, this lens helps you capture critical details with accuracy. Its robust construction and smooth manual zoom and focus operations ensure dependable performance in demanding environments, day or night. In short, the Marshall 7-34 mm varifocal lens is a smart, future-proof choice for anyone who values image fidelity, quick focal adjustments, and a compact, durable design in a single lens.

• 7-34 mm focal range with 4.9x optical zoom enables you to frame broad entrances or narrow corridors without swapping lenses, providing a single, adaptable solution that covers multiple surveillance scenarios with outstanding clarity and consistency.
• Ultra-bright aperture from f/0.95 to f/1 offers exceptional low-light performance and natural subject isolation, helping you capture identifiable details even in dim hallways, parking areas, or night-time perimeter coverage.
• CS-mount compatibility ensures quick, tool-free installation with most CCTV and IP cameras, while smooth manual zoom and focus let you dial in precise framing, sharpness, and depth of field for actionable footage.
• High optical quality with low distortion and edge-to-edge sharpness minimizes the need for post-processing corrections, enabling reliable automated analytics and easier forensic review across the entire image.
• Rugged, reliable build designed for continuous, 24/7 surveillance deployments, with robust lens mechanics that resist wear in demanding environments and deliver long service life even under heavy usage.

Technical Details of Marshall - 7 mm to 34 mm - f/0.95 - f/1 - Varifocal Lens for CS Mount

• Mount type: CS-mount designed for compatibility with a wide range of security cameras and enclosure systems.
• Focal length range: 7–34 mm, providing versatile field of view from wide-angle to telephoto within a single lens.
• Aperture range: f/0.95 at the wide end up to f/1 at the telephoto end, delivering strong light transmission for low-light environments and improved subject separation.
• Optical zoom: 4.9x optical zoom ensures smooth, precise framing as you adjust from wide to tele without introducing distortion or image latency.
• Focus control: Manual focus with a precise, tactile rotation for exact sharpness, suitable for security scenarios where autofocus may be unreliable or unavailable.
• Image quality: Engineered to minimize distortion and maintain edge-to-edge sharpness, enhancing clarity for facial features and license plate recognition across the frame.
• Construction: Durable metal housing designed to withstand the rigors of daily security operations and to maintain alignment even with repeated zoom and focus adjustments.

How to install Marshall - 7 mm to 34 mm - f/0.95 - f/1 - Varifocal Lens for CS Mount

• Power down the surveillance system and disconnect power to the camera before removing or installing lenses to prevent electrical damage and to protect the sensor during handling.
• Carefully remove the existing lens from the CS-mount; handle the camera and lens with clean hands or gloves to avoid transferring dust or oils to the mount surfaces.
• Inspect the CS-mount threads for any debris or burrs, and gently clean them with a lint-free cloth or a recommended lens-cleaning tool to ensure smooth threading and optimal seal integrity.
• Gently thread the Marshall lens onto the CS mount until it seats evenly; avoid overtightening to prevent thread damage and to preserve proper flange focal distance for accurate focus across the zoom range.
• Set the zoom to a convenient mid-range (start around 17–20 mm) to establish framing, then gradually rotate to either the widest (7 mm) or teleest (34 mm) position as your scene requires, while maintaining manual focus to achieve sharpness.
• Rotate the focus ring slowly to refine the image until details such as faces, license plates, or signs appear crisp across the entire scene; if your camera supports iris control, adjust exposure to balance brightness and reduce motion blur in variable lighting.
• Recheck alignment in your surveillance software, verify exposure settings, and perform a final sweep of the scene at different focal lengths to ensure consistent sharpness and coverage throughout the field of view.

Frequently asked questions

• Q: What cameras is this lens compatible with? A: It is designed for CS-mount surveillance cameras and works with cameras that support standard CS-mount interfaces. Always verify flange focal distance with your specific camera model to ensure optimal focus across the zoom range.
• Q: What is the focal length range, and how does it affect field of view? A: The focal length range is 7–34 mm, offering a 4.9x optical zoom. This allows you to cover wide entrances with a broad field of view and quickly zoom in on distant details, such as faces or license plates, without swapping lenses.
• Q: How does the lens perform in low light? A: The wide-end aperture of f/0.95 provides substantial light throughput, improving image brightness and reducing noise in dim environments. While performance improves in low light, adequate scene lighting is still important for best results.
• Q: Is autofocus available with this lens? A: This is a manual-focus varifocal lens. Some camera systems can provide autofocus, but the lens itself relies on manual focus control to achieve precise sharpness, especially at telephoto settings.
• Q: How do I ensure proper installation and alignment? A: Confirm CS-mount compatibility, clean the mount surface, avoid overtightening, and verify correct flange focal distance. After installation, test across the full zoom range to ensure consistent focus and image quality.
• Q: Can I use this lens on multiple cameras or systems? A: Yes, as long as the cameras support CS-mount interfaces and the flange distance is compatible. It’s a versatile choice for mixed security deployments where a single lens can cover multiple viewpoints.