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- Varifocal Lens Design: Adjustable focal length from 3.5 mm to 8.0 mm, allowing users to fine-tune the field of view and zoom level without changing lenses.
- CS-Mount Interface: Standardized CS-mount for compatibility with a wide range of surveillance and machine vision cameras.
- DC Auto Iris (AI): Integrated auto iris control driven by a DC signal from the camera, automatically adjusting aperture size to maintain consistent image exposure under varying lighting conditions.
- High Optical Precision: Multi-element glass optics designed to minimize distortion, chromatic aberration, and vignetting across the zoom range.
- Compact and Lightweight Construction: Engineered for compact camera housings and dome cameras where space is limited.
- Manual Zoom and Focus Adjustment: Smooth mechanical rings for precise manual adjustment of focal length and focus distance.
- Wide to Medium Telephoto Coverage: Suitable for both wide-area monitoring and focused observation zones.
- AI-Compatible (Auto Iris): The “AI” designation indicates compatibility with Auto Iris camera control systems, ensuring dynamic exposure management.
- Durable Housing: Metal or reinforced composite body for long-term stability and resistance to mechanical wear.
- Optimized for 1/3" and 1/2.7" Image Sensors: Ensures full sensor coverage without vignetting or edge distortion.
- CS-Mount Interface: Standardized CS-mount for compatibility with a wide range of surveillance and machine vision cameras.
- DC Auto Iris (AI): Integrated auto iris control driven by a DC signal from the camera, automatically adjusting aperture size to maintain consistent image exposure under varying lighting conditions.
- High Optical Precision: Multi-element glass optics designed to minimize distortion, chromatic aberration, and vignetting across the zoom range.
- Compact and Lightweight Construction: Engineered for compact camera housings and dome cameras where space is limited.
- Manual Zoom and Focus Adjustment: Smooth mechanical rings for precise manual adjustment of focal length and focus distance.
- Wide to Medium Telephoto Coverage: Suitable for both wide-area monitoring and focused observation zones.
- AI-Compatible (Auto Iris): The “AI” designation indicates compatibility with Auto Iris camera control systems, ensuring dynamic exposure management.
- Durable Housing: Metal or reinforced composite body for long-term stability and resistance to mechanical wear.
- Optimized for 1/3" and 1/2.7" Image Sensors: Ensures full sensor coverage without vignetting or edge distortion.
1. Product Overview
Product Name: Lens CS Varifocal f=3.5–8.0 mm, AI
Model: V3508D
Series: V-Series Varifocal Lens Line
Article Number: V3508D
Manufacturer: [Manufacturer name not specified in source; typically used by OEMs and surveillance camera manufacturers]
The V3508D is a precision-engineered CS-mount varifocal lens designed for professional imaging and surveillance applications. It offers a variable focal length range of 3.5 mm to 8.0 mm, providing flexible field-of-view adjustment for diverse monitoring environments. The lens incorporates a DC auto iris (AI) mechanism, enabling automatic control of the aperture in response to changing light conditions. This ensures optimal image brightness and contrast in both indoor and outdoor settings. The V3508D is part of a family of high-performance varifocal lenses optimized for CCTV, IP, and analog camera systems, delivering consistent optical quality, mechanical reliability, and ease of integration.
2. Key Features
- Varifocal Lens Design: Adjustable focal length from 3.5 mm to 8.0 mm, allowing users to fine-tune the field of view and zoom level without changing lenses.
- CS-Mount Interface: Standardized CS-mount for compatibility with a wide range of surveillance and machine vision cameras.
- DC Auto Iris (AI): Integrated auto iris control driven by a DC signal from the camera, automatically adjusting aperture size to maintain consistent image exposure under varying lighting conditions.
- High Optical Precision: Multi-element glass optics designed to minimize distortion, chromatic aberration, and vignetting across the zoom range.
- Compact and Lightweight Construction: Engineered for compact camera housings and dome cameras where space is limited.
- Manual Zoom and Focus Adjustment: Smooth mechanical rings for precise manual adjustment of focal length and focus distance.
- Wide to Medium Telephoto Coverage: Suitable for both wide-area monitoring and focused observation zones.
- AI-Compatible (Auto Iris): The “AI” designation indicates compatibility with Auto Iris camera control systems, ensuring dynamic exposure management.
- Durable Housing: Metal or reinforced composite body for long-term stability and resistance to mechanical wear.
- Optimized for 1/3" and 1/2.7" Image Sensors: Ensures full sensor coverage without vignetting or edge distortion.
3. Technical Specifications
- Mount Type: CS-mount (flange focal distance: 12.5 mm)
- Focal Length Range: 3.5 mm to 8.0 mm (varifocal)
- Aperture Control: DC Auto Iris (AI type)
- Iris Range: Typically F1.4 to close (exact range may vary by manufacturer)
- Optical Format: 1/3" or compatible with 1/2.7" sensors
- Field of View (approximate):
- Horizontal: ~90° at 3.5 mm, ~40° at 8.0 mm (depending on sensor size)
- Vertical: ~67° at 3.5 mm, ~30° at 8.0 mm
- Minimum Object Distance: Approximately 0.3 m (1 ft)
- Focus Adjustment: Manual ring with locking mechanism
- Zoom Adjustment: Manual ring with locking mechanism
- Iris Drive Type: DC-controlled auto iris (requires camera with DC iris output)
- Lens Construction: Multi-element glass optics with anti-reflective coating
- Housing Material: Metal alloy or high-strength composite
- Dimensions (approximate):
- Length: 40–50 mm (depending on focus position)
- Diameter: 30–35 mm
- Weight: Approximately 60–90 g
- Operating Temperature Range: –10°C to +50°C (typical)
- Storage Temperature Range: –20°C to +60°C
- Mounting Thread: Standard CS-mount thread (1"–32 UN 2A)
4. Functionality
The V3508D operates as a varifocal imaging lens for cameras equipped with a CS-mount interface. Its 3.5–8.0 mm focal range allows users to adjust the field of view from wide-angle coverage to a narrower, more detailed perspective. The DC auto iris mechanism automatically regulates the aperture based on the camera’s control signal, ensuring consistent image brightness in environments with fluctuating illumination—such as outdoor surveillance during day/night transitions or indoor areas with variable lighting.
Use Cases and Applications:
- Video Surveillance Systems: Ideal for security cameras in retail, office, industrial, and public spaces.
- Machine Vision: Suitable for inspection systems requiring adjustable field of view.
- Traffic Monitoring: Effective for roadside or intersection cameras needing adaptable zoom.
- Access Control and Building Security: Provides flexible coverage for entryways, corridors, and parking areas.
- Broadcast and Media Production: Can be used in compact camera setups requiring variable framing.
Compatibility:
- Compatible with CS-mount cameras supporting DC auto iris control.
- Works with both analog CCTV and digital IP cameras.
- Suitable for 1/3" and 1/2.7" image sensors.
- Can be adapted to C-mount cameras using a 5 mm CS-to-C adapter ring if required.
5. Components & Accessories
Included Items:
- V3508D lens unit
- Protective front and rear lens caps
- Integrated DC auto iris cable with standard 4-pin connector (for camera connection)
- User documentation or datasheet (depending on supplier)
Optional Accessories:
- CS-to-C mount adapter ring (for use with C-mount cameras)
- Lens holder or bracket for fixed mounting
- Extension cables for DC iris connection
- Protective housing or dome cover for outdoor installations
Connectors:
- Auto Iris Connector: Standard 4-pin plug (DC type)
- Pin 1: Damping coil (+)
- Pin 2: Damping coil (–)
- Pin 3: Drive coil (+)
- Pin 4: Drive coil (–)
6. Installation & Setup
Requirements:
- Camera with CS-mount interface and DC auto iris output.
- Proper mechanical support or bracket for stable lens positioning.
- Clean, dust-free environment during installation to prevent contamination of optical surfaces.
Mounting Options:
1. Direct CS-Mount Installation: Screw the lens into the camera’s CS-mount thread until snug.
2. C-Mount Adaptation: If using a C-mount camera, install a 5 mm adapter ring between the lens and camera body.
3. Locking Mechanisms: Use the provided focus and zoom locking screws to secure adjustments.
Configuration Steps:
1. Attach the lens to the camera securely.
2. Connect the DC auto iris cable to the camera’s iris control port.
3. Power on the camera and verify iris operation (the aperture should adjust automatically to light changes).
4. Adjust the zoom ring to set the desired focal length.
5. Adjust the focus ring for sharp image clarity at the target distance.
6. Tighten the locking screws to maintain settings.
Calibration:
- Perform fine focus adjustment under actual lighting conditions.
- Verify iris response by varying illumination and observing aperture movement.
7. Performance & Capabilities
Optical Performance:
- Delivers sharp, high-contrast images across the zoom range.
- Maintains consistent resolution from center to edge of frame.
- Low geometric distortion, particularly at mid-zoom settings.
- Optimized for visible light spectrum (400–700 nm).
Speed and Responsiveness:
- DC auto iris provides rapid aperture adjustment (<100 ms response typical).
- Smooth mechanical zoom and focus operation for precise manual control.
Capacity and Coverage:
- Wide-angle coverage at 3.5 mm suitable for large-area monitoring.
- Narrower field at 8.0 mm ideal for focused observation or identification tasks.
Efficiency:
- Auto iris reduces overexposure and improves dynamic range in variable lighting.
- Compact design minimizes weight load on camera gimbals or mounts.
Limitations:
- Not designed for megapixel or 4K sensors beyond 1/2" format (may exhibit edge softness).
- Requires camera with DC iris control; not compatible with video-type (EE) iris systems.
- Manual zoom and focus adjustments require physical access to the lens.
8. Standards & Compliance
- Mount Standard: CS-mount per industry specification (1"–32 UN 2A thread, 12.5 mm flange focal distance).
- Auto Iris Standard: DC-type control per CCTV industry convention.
- Optical Format Compatibility: 1/3" and 1/2.7" image sensors (standardized sensor sizes).
- RoHS Compliance: Constructed using materials compliant with Restriction of Hazardous Substances (RoHS) directives.
- CE Marking: Meets applicable European safety and EMC standards for electronic components (when integrated into compliant camera systems).
- Environmental Standards: Designed for operation within standard indoor/outdoor surveillance temperature ranges.
- Quality Assurance: Manufactured under ISO 9001-certified production processes (typical for professional optical components).
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–3 years depending on supplier).
- Covers defects in materials and workmanship under normal use conditions.
Support:
- Technical documentation, datasheets, and installation guides available from authorized distributors.
- Customer support for integration and compatibility inquiries.
Maintenance:
- Clean lens surfaces periodically using optical-grade cleaning materials.
- Avoid exposure to excessive moisture or dust.
- Inspect iris cable and connectors for wear or damage during routine maintenance.
Updates and Replacements:
- Compatible with newer CS-mount camera models supporting DC iris control.
- Replacement parts (iris cable, caps) available through authorized service channels.
- Successor models may offer extended focal ranges or megapixel-rated optics for higher-resolution cameras.
Summary
The V3508D Lens CS Varifocal f=3.5–8.0 mm, DC Auto Iris (AI) is a versatile, high-quality optical component engineered for professional surveillance and imaging systems. Its adjustable focal range, automatic iris control, and standard CS-mount interface make it a flexible solution for a wide variety of camera applications. Designed for reliability, precision, and ease of integration, the V3508D delivers consistent optical performance across diverse lighting and environmental conditions. Whether deployed in security, industrial, or research settings, this lens provides the adaptability and image quality required for demanding visual monitoring tasks.
Product Name: Lens CS Varifocal f=3.5–8.0 mm, AI
Model: V3508D
Series: V-Series Varifocal Lens Line
Article Number: V3508D
Manufacturer: [Manufacturer name not specified in source; typically used by OEMs and surveillance camera manufacturers]
The V3508D is a precision-engineered CS-mount varifocal lens designed for professional imaging and surveillance applications. It offers a variable focal length range of 3.5 mm to 8.0 mm, providing flexible field-of-view adjustment for diverse monitoring environments. The lens incorporates a DC auto iris (AI) mechanism, enabling automatic control of the aperture in response to changing light conditions. This ensures optimal image brightness and contrast in both indoor and outdoor settings. The V3508D is part of a family of high-performance varifocal lenses optimized for CCTV, IP, and analog camera systems, delivering consistent optical quality, mechanical reliability, and ease of integration.
2. Key Features
- Varifocal Lens Design: Adjustable focal length from 3.5 mm to 8.0 mm, allowing users to fine-tune the field of view and zoom level without changing lenses.
- CS-Mount Interface: Standardized CS-mount for compatibility with a wide range of surveillance and machine vision cameras.
- DC Auto Iris (AI): Integrated auto iris control driven by a DC signal from the camera, automatically adjusting aperture size to maintain consistent image exposure under varying lighting conditions.
- High Optical Precision: Multi-element glass optics designed to minimize distortion, chromatic aberration, and vignetting across the zoom range.
- Compact and Lightweight Construction: Engineered for compact camera housings and dome cameras where space is limited.
- Manual Zoom and Focus Adjustment: Smooth mechanical rings for precise manual adjustment of focal length and focus distance.
- Wide to Medium Telephoto Coverage: Suitable for both wide-area monitoring and focused observation zones.
- AI-Compatible (Auto Iris): The “AI” designation indicates compatibility with Auto Iris camera control systems, ensuring dynamic exposure management.
- Durable Housing: Metal or reinforced composite body for long-term stability and resistance to mechanical wear.
- Optimized for 1/3" and 1/2.7" Image Sensors: Ensures full sensor coverage without vignetting or edge distortion.
3. Technical Specifications
- Mount Type: CS-mount (flange focal distance: 12.5 mm)
- Focal Length Range: 3.5 mm to 8.0 mm (varifocal)
- Aperture Control: DC Auto Iris (AI type)
- Iris Range: Typically F1.4 to close (exact range may vary by manufacturer)
- Optical Format: 1/3" or compatible with 1/2.7" sensors
- Field of View (approximate):
- Horizontal: ~90° at 3.5 mm, ~40° at 8.0 mm (depending on sensor size)
- Vertical: ~67° at 3.5 mm, ~30° at 8.0 mm
- Minimum Object Distance: Approximately 0.3 m (1 ft)
- Focus Adjustment: Manual ring with locking mechanism
- Zoom Adjustment: Manual ring with locking mechanism
- Iris Drive Type: DC-controlled auto iris (requires camera with DC iris output)
- Lens Construction: Multi-element glass optics with anti-reflective coating
- Housing Material: Metal alloy or high-strength composite
- Dimensions (approximate):
- Length: 40–50 mm (depending on focus position)
- Diameter: 30–35 mm
- Weight: Approximately 60–90 g
- Operating Temperature Range: –10°C to +50°C (typical)
- Storage Temperature Range: –20°C to +60°C
- Mounting Thread: Standard CS-mount thread (1"–32 UN 2A)
4. Functionality
The V3508D operates as a varifocal imaging lens for cameras equipped with a CS-mount interface. Its 3.5–8.0 mm focal range allows users to adjust the field of view from wide-angle coverage to a narrower, more detailed perspective. The DC auto iris mechanism automatically regulates the aperture based on the camera’s control signal, ensuring consistent image brightness in environments with fluctuating illumination—such as outdoor surveillance during day/night transitions or indoor areas with variable lighting.
Use Cases and Applications:
- Video Surveillance Systems: Ideal for security cameras in retail, office, industrial, and public spaces.
- Machine Vision: Suitable for inspection systems requiring adjustable field of view.
- Traffic Monitoring: Effective for roadside or intersection cameras needing adaptable zoom.
- Access Control and Building Security: Provides flexible coverage for entryways, corridors, and parking areas.
- Broadcast and Media Production: Can be used in compact camera setups requiring variable framing.
Compatibility:
- Compatible with CS-mount cameras supporting DC auto iris control.
- Works with both analog CCTV and digital IP cameras.
- Suitable for 1/3" and 1/2.7" image sensors.
- Can be adapted to C-mount cameras using a 5 mm CS-to-C adapter ring if required.
5. Components & Accessories
Included Items:
- V3508D lens unit
- Protective front and rear lens caps
- Integrated DC auto iris cable with standard 4-pin connector (for camera connection)
- User documentation or datasheet (depending on supplier)
Optional Accessories:
- CS-to-C mount adapter ring (for use with C-mount cameras)
- Lens holder or bracket for fixed mounting
- Extension cables for DC iris connection
- Protective housing or dome cover for outdoor installations
Connectors:
- Auto Iris Connector: Standard 4-pin plug (DC type)
- Pin 1: Damping coil (+)
- Pin 2: Damping coil (–)
- Pin 3: Drive coil (+)
- Pin 4: Drive coil (–)
6. Installation & Setup
Requirements:
- Camera with CS-mount interface and DC auto iris output.
- Proper mechanical support or bracket for stable lens positioning.
- Clean, dust-free environment during installation to prevent contamination of optical surfaces.
Mounting Options:
1. Direct CS-Mount Installation: Screw the lens into the camera’s CS-mount thread until snug.
2. C-Mount Adaptation: If using a C-mount camera, install a 5 mm adapter ring between the lens and camera body.
3. Locking Mechanisms: Use the provided focus and zoom locking screws to secure adjustments.
Configuration Steps:
1. Attach the lens to the camera securely.
2. Connect the DC auto iris cable to the camera’s iris control port.
3. Power on the camera and verify iris operation (the aperture should adjust automatically to light changes).
4. Adjust the zoom ring to set the desired focal length.
5. Adjust the focus ring for sharp image clarity at the target distance.
6. Tighten the locking screws to maintain settings.
Calibration:
- Perform fine focus adjustment under actual lighting conditions.
- Verify iris response by varying illumination and observing aperture movement.
7. Performance & Capabilities
Optical Performance:
- Delivers sharp, high-contrast images across the zoom range.
- Maintains consistent resolution from center to edge of frame.
- Low geometric distortion, particularly at mid-zoom settings.
- Optimized for visible light spectrum (400–700 nm).
Speed and Responsiveness:
- DC auto iris provides rapid aperture adjustment (<100 ms response typical).
- Smooth mechanical zoom and focus operation for precise manual control.
Capacity and Coverage:
- Wide-angle coverage at 3.5 mm suitable for large-area monitoring.
- Narrower field at 8.0 mm ideal for focused observation or identification tasks.
Efficiency:
- Auto iris reduces overexposure and improves dynamic range in variable lighting.
- Compact design minimizes weight load on camera gimbals or mounts.
Limitations:
- Not designed for megapixel or 4K sensors beyond 1/2" format (may exhibit edge softness).
- Requires camera with DC iris control; not compatible with video-type (EE) iris systems.
- Manual zoom and focus adjustments require physical access to the lens.
8. Standards & Compliance
- Mount Standard: CS-mount per industry specification (1"–32 UN 2A thread, 12.5 mm flange focal distance).
- Auto Iris Standard: DC-type control per CCTV industry convention.
- Optical Format Compatibility: 1/3" and 1/2.7" image sensors (standardized sensor sizes).
- RoHS Compliance: Constructed using materials compliant with Restriction of Hazardous Substances (RoHS) directives.
- CE Marking: Meets applicable European safety and EMC standards for electronic components (when integrated into compliant camera systems).
- Environmental Standards: Designed for operation within standard indoor/outdoor surveillance temperature ranges.
- Quality Assurance: Manufactured under ISO 9001-certified production processes (typical for professional optical components).
9. Additional Information
Warranty:
- Standard manufacturer’s warranty (typically 1–3 years depending on supplier).
- Covers defects in materials and workmanship under normal use conditions.
Support:
- Technical documentation, datasheets, and installation guides available from authorized distributors.
- Customer support for integration and compatibility inquiries.
Maintenance:
- Clean lens surfaces periodically using optical-grade cleaning materials.
- Avoid exposure to excessive moisture or dust.
- Inspect iris cable and connectors for wear or damage during routine maintenance.
Updates and Replacements:
- Compatible with newer CS-mount camera models supporting DC iris control.
- Replacement parts (iris cable, caps) available through authorized service channels.
- Successor models may offer extended focal ranges or megapixel-rated optics for higher-resolution cameras.
Summary
The V3508D Lens CS Varifocal f=3.5–8.0 mm, DC Auto Iris (AI) is a versatile, high-quality optical component engineered for professional surveillance and imaging systems. Its adjustable focal range, automatic iris control, and standard CS-mount interface make it a flexible solution for a wide variety of camera applications. Designed for reliability, precision, and ease of integration, the V3508D delivers consistent optical performance across diverse lighting and environmental conditions. Whether deployed in security, industrial, or research settings, this lens provides the adaptability and image quality required for demanding visual monitoring tasks.
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