Give your camera the optical precision it needs. The Hikvision HV3816P-8MPIR is an 8-megapixel, P-iris varifocal lens designed for professional CCTV installations. With a 3.8–16 mm zoom range, CS-mount fitting and a high-quality aspherical design, this lens delivers crisp detail, controlled depth of field and dependable performance in changing light — perfect for entrances, retail counters, corridors and medium-range surveillance tasks.
Why spec this lens?
If you want useful footage rather than fuzzy wide-angle impressions, a quality varifocal lens is key. The HV3816P-8MPIR lets you tune the field of view on site, then lock focus and zoom for consistent image framing. The P-iris keeps exposure and depth of field stable as lighting changes, which is especially useful in scenes with bright highlights or mixed indoor/outdoor lighting.
Benefits
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Flexible framing: 3.8–16 mm focal range covers wide to medium telephoto needs so installers can dial in the exact view on site.
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High-resolution ready: Designed to cover up to 8 MP sensors (1/1.8" image circle) without vignetting.
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Consistent exposure: P-iris control stabilises image brightness and improves sharpness across the frame.
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Robust optics: Aspherical elements reduce distortion and improve edge-to-edge clarity for identification tasks.
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Compact & practical: Lightweight design and CS-mount makes integration simple for most professional cameras.
Technical specifications
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Model: HV3816P-8MPIR
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Type: Varifocal P-iris lens (8 MP, IR compatible)
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Focal length: 3.8–16 mm
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Aperture / F-number: F1.4-C
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Mount: CS-mount (use C/CS adapter if camera requires)
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Maximum image format: Ø9 mm (suitable for 1/1.8" sensors)
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Minimum object distance (M.O.D): 0.1 m
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Dimensions: Ø55 × 75 mm (approx.)
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Weight: 237 g
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Flange back length: 12.5 mm
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Operating temperature: -20 °C to +60 °C
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Field of view (approx.):
- Diagonal (1/1.8"): 124.7° – 33.8°
- Horizontal (1/1.8"): 99.8° – 27.1°
- Vertical (1/1.8"): 74.7° – 20.4°
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Focus: Manual
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Zoom: Manual
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Iris control: P-iris (precision electronic iris)
Typical use cases
- Reception areas where you need both wide context and clear facial detail.
- Retail aisles — capture product displays and shopper movement with clarity.
- Medium-range entrances and driveways requiring adjustable framing for vehicles or people.
- Upgrades to existing camera systems where improved lens optics will unlock the sensor’s full potential.
Installation & setup tips
- Fit to any camera with a CS-mount. If your camera uses a C-mount, use a C/CS adapter to ensure correct flange focal distance.
- Mount the camera and set live view on your recorder or monitor before finalising zoom and focus — adjust zoom first, then focus for best results.
- P-iris requires a compatible camera or controller to drive the iris — confirm compatibility, otherwise the lens will operate in a default/manual mode.
- Lock zoom and focus set screws after adjustment to prevent drift from vibration or tampering.
- If you use IR illumination, check that the IR pattern covers the lens field of view evenly to avoid hotspots or fall-off.
Frequently asked questions
Will this lens cover my 4K camera?
This lens is rated for up to 8 MP on a 1/1.8" image circle. It will perform well on many high-resolution cameras, but check your camera’s sensor size and mounting flange to ensure full coverage without vignetting.
Do I need a special controller for the P-iris?
P-iris requires an electronic iris driver or camera input that supports P-iris control. If your camera doesn’t support P-iris, the lens can still be used manually but you’ll lose the automatic electronic iris benefits.
Is this lens weatherproof?
The lens itself is an optical accessory and should be installed inside a suitable camera housing or weatherproof enclosure for outdoor use.
Finish your install with confidence
The Hikvision HV3816P-8MPIR lens pairs precision optics with practical install flexibility — ideal for technicians and integrators who want crisp, reliable images across a variety of scenes. Add it to your kit when you need tunable field of view, tight control of exposure and full use of high-resolution camera sensors.
Short blurb (for collection pages): Hikvision HV3816P-8MPIR — 8 MP P-iris varifocal lens 3.8–16 mm (CS-mount). Precision optics for professional CCTV systems.
