Hanwha Techwin SLA-F-M1550DNL: 15-50mm F/1.5 CS-Mount Aspherical Varifocal Lens

Engineered for high-clarity security surveillance, the SLA-F-M1550DNL from Hanwha Techwin delivers premium image quality across a broad 15-50mm focal range with a bright f/1.5 maximum aperture. This CS-mount varifocal lens uses advanced optics and a carefully designed glass composition to optimize color and monochrome performance for 3MP cameras, making it ideal for both daytime and low-light scenarios. Built to integrate seamlessly with color, Black & White, and Day/Night camera systems, this lens provides reliable edge-to-edge sharpness, precise zoom control, and consistent imaging across the scene.

• High-image quality for 3MP cameras. Precision optical design with aspherical elements minimizes distortion and preserves sharpness across the entire frame, delivering consistent color fidelity from corner to corner.
• 3.3x varifocal zoom from 15mm to 50mm. Flexible field of view to cover wide entrances or focus in on distant details without swapping lenses, ideal for surveillance in lobbies, hallways, parking lots, and perimeters.
• Bright f/1.5 maximum aperture. Enhanced low-light performance and better subject isolation, enabling clearer images in dim lighting and during twilight periods.
• CS-mount compatibility for easy integration. Specifically designed for Hanwha Techwin cameras and other CS-mount systems, enabling straightforward installation in existing housings and mounts.
• Advanced optical glass and coatings. The combination of specialized optic glass and coating technology reduces flare and ghosting while improving contrast and color rendition in both color and monochrome modes.

Technical Details of Hanwha Techwin SLA-F-M1550DNL

• Focal length: 15–50 mm
• Maximum aperture: F/1.5
• Mount: CS
• Zoom ratio: 3.3x
• Image format compatibility: Supports 3MP surveillance cameras
• Optical design: Aspherical elements with advanced optic glass for reduced distortion and improved image quality
• Focus mechanism: Varifocal with manual focus control for precise targeting of subjects at varying distances
• Iris control: Manual iris design to provide consistent exposure control across the zoom range
• Application: Suitable for color, Black & White, and Day/Night camera systems

How to install Hanwha Techwin SLA-F-M1550DNL

• Power down the camera and disconnect power before handling lenses to prevent electrical or static damage.
• Remove the existing CS-mount lens or accessory from the camera’s CS mount, ensuring no debris falls into the mount.
• Gently align the SLA-F-M1550DNL with the camera’s CS mount threads. Begin threading clockwise by hand to avoid cross-threading, then tighten until seated securely without forcing.
• Secure any mounting ring or screws provided with the lens or camera housing as required by your installation kit to lock the lens in place.
• Power the camera back on. Use the lens’s zoom ring to select your desired field of view (from wide 15mm to tele 50mm), then adjust the focus ring to achieve sharpness at the target distance.
• In the camera’s imaging menu, set the iris or exposure parameters to suit the scene. If the camera supports auto-iris, you can enable it; otherwise, use the manual iris setting on the lens for consistent exposure across the zoom range.
• Verify alignment with the scene: check corners for distortion, confirm consistent color rendition, and re-check focus at both near and far distances. Make minor fine-tuning as needed.

Frequently asked questions

• Q: What cameras is this lens compatible with?
  A: The SLA-F-M1550DNL is designed for CS-mount surveillance cameras and works well with 3MP systems. It is suitable for color, Black & White, and Day/Night configurations when paired with compatible sensors.
• Q: What is the focal length range and zoom capability?
  A: The lens covers 15 mm to 50 mm, providing a 3.3x zoom range for flexible field-of-view control from wide-angle to telephoto without changing lenses.
• Q: What is the maximum aperture, and how does it affect low-light performance?
  A: The maximum aperture is f/1.5, which enables higher light intake for brighter images in low-light conditions and tighter subject isolation at longer focal lengths.
• Q: How do I install and adjust the lens?
  A: Install the lens into a CS mount on the camera, secure it, power up, then adjust the zoom using the zoom ring and focus using the focus ring. If the camera supports iris control, set exposure accordingly or use the manual iris on the lens for consistent results.
• Q: Does the lens require special maintenance?
  A: Like most precision lenses, keep the optics clean and free from dust or fingerprints. Use only approved cleaning methods for optical glass and ensure the lens is stored in a clean, dry environment when not in use.