Bosch 9 mm to 40 mm Varifocal CS Mount Lens | f/1.5 to f/8 | 4.4x Optical Zoom

Elevate your security system with the Bosch 9–40 mm varifocal CS-mount lens, a precision optical solution engineered for demanding surveillance environments. This high-performance lens is designed to deliver outstanding image clarity, consistent color rendition, and reliable performance across its expansive focal range. With a 4.4x optical zoom, a versatile aperture range from f/1.5 to f/8, and a compact 2.2-inch diameter housing, it’s the ideal upgrade for CS-mount cameras that require flexible framing, sharp detail, and dependable performance in changing lighting conditions. Whether you’re securing a retail storefront, monitoring a corridor, or surveying an outdoor perimeter, this Bosch lens provides the optical control you need to capture critical details without compromising image quality.

• Versatile 9–40 mm focal range with 4.4x optical zoom: This varifocal design lets you frame a wide scene at the 9 mm end and smoothly transition to tighter compositions at 40 mm without moving the camera. It’s perfect for spaces where you need both broad coverage and the ability to zoom in on focused subjects, such as entryways, aisles, parking lots, and loading docks. The seamless zoom control enables operators to adapt in real time to shifting scenes, reducing the need for multiple fixed lenses and enabling faster incident response.
• Bright aperture range from f/1.5 to f/8 for low-light and high-contrast scenes: An f/1.5 maximum aperture helps maximize light transmission in dim conditions, improving subject visibility and allowing faster shutter speeds for clearer, less grainy images. When lighting is abundant or you require a larger depth of field, the lens can be stopped down to f/8 to maintain edge-to-edge sharpness across the zoom range. This balance delivers reliable performance from dawn til dusk and into the night when paired with compatible imaging sensors.
• CS Mount compatibility for broad integration: Crafted for CS-mount cameras, this lens integrates easily into many existing security infrastructures. The CS mount offers a compact form factor and straightforward installation while preserving compatibility with camera housings, mounts, and cabling common in contemporary surveillance deployments. This makes upgrades and replacements simpler, enabling facilities to refresh lens optics without replacing entire camera platforms.
• Compact, robust design with a 2.2-inch diameter: The lens’s compact footprint is designed for discreet installation in tight spaces and protective housings. The sturdy construction is suited to demanding environments found in commercial, industrial, and public safety settings, where reliability and long-term performance are critical. The unobtrusive profile also helps minimize visual intrusion and maintains a clean aesthetic for architectural cameras and security installations.
• Professional-grade optical performance for high-detail footage: Bosch lenses are engineered to deliver precise focal control, consistent color, and minimal distortion across the zoom range. This ensures that security operators receive dependable footage for identification, incident review, and evidence gathering. The combination of sharp center-to-edge performance and reliable chromatic consistency helps security teams monitor complex scenes with confidence, from busy retail floors to expansive outdoor vistas.

Technical Details of Bosch 9 mm to 40 mm - f/8 - f/1.5 - Varifocal Lens for CS Mount

• Mount: CS Mount
• Focal Length: 9–40 mm
• Aperture Range: f/1.5 (maximum) to f/8 (minimum)
• Optical Zoom: 4.4x
• Diameter: 2.2 inches (56 mm)
• Application: Designed for surveillance cameras and security systems
• Design Intent: High-performance optics for professional security deployments with reliable imaging across varying scenes

How to Install Bosch 9 mm to 40 mm Varifocal Lens

• Prepare the camera and lens: Power down the camera and disconnect any power sources before handling components to prevent damage. Verify that the camera supports CS-mount lenses and that the lens thread corresponds to the CS mount on the housing.
• Remove old lens or mount adapter (if applicable): If replacing an existing lens, carefully detach it from the CS mount and clean the mounting surface to remove dust, grease, or debris that could affect image quality.
• Align and attach the lens: Hold the Bosch varifocal lens against the CS mount, aligning index marks or alignment guides. Gently thread the lens into place, ensuring a smooth fit without cross-threading. Once seated, tighten the mount screws or locking ring to secure the lens, taking care not to overtighten and damage the threads or housing.
• Initial focus and zoom adjustment: Reconnect power and power up the camera. Use the camera’s lens control interface or physical rings on the lens to set the desired focal length between 9 mm and 40 mm. Begin with a mid-range focal length, then fine-tune focus at each position to achieve sharpness across the frame.
• Fine-tune exposure and verify image quality: After initial focus, review footage across the zoom range to check for distortions, vignetting, or color shifts. Adjust camera exposure settings, white balance, and any auto-iris controls (if supported by the camera) to ensure consistent brightness and color fidelity in monitored scenes. Store preferred focal positions if your system supports presets.

Frequently asked questions

• Q: What is the focal length range of this lens?
• A: The lens covers a focal length range of 9–40 mm, providing a wide-angle view at the short end and a tighter, zoomed-in field at the long end for detailed subject capture.
• Q: What mount does this lens use?
• A: It uses a CS Mount, making it compatible with CS-mount surveillance cameras and many standard housings.
• Q: What is the aperture range?
• A: The lens supports an aperture range from f/1.5 to f/8, allowing strong low-light performance and flexible depth-of-field control across the zoom range.
• Q: Is this lens suitable for outdoor surveillance?
• A: The lens is designed for surveillance cameras and security deployments. Outdoor suitability depends on the camera housing and environmental sealing; pairing this lens with an appropriate weatherproof housing is recommended for exterior use.
• Q: How do I focus and zoom with this lens?
• A: Use the lens’s zoom/focus controls in combination with your camera’s lens control interface. Begin at a mid focal length, then adjust focus for the current zoom level. For best results, test at multiple focal lengths to ensure sharpness throughout the range.