Hikvision HIK-HV3816P8MPIR Lens, 8MP P Iris, 3.8-16mm, F1.5 CS 1/1.8"

Model: HIK-HV3816P8MPIR

Who This Is For

When specifying a replacement or upgrade lens for a CS mount P-iris camera that needs to resolve 8MP detail, the Hikvision HIK-HV3816P8MPIR is the component to evaluate. It is aimed at integrators and technically confident installers who are building out or repairing high-resolution fixed camera systems - particularly where the original lens is inadequate for the sensor size, or where a varifocal range of 3.8-16mm is needed to dial in field of view without physically repositioning the camera. The F1.5 maximum aperture and 1/1.8-inch format coverage make it a deliberate match for larger 8MP sensors, where a smaller-format lens would introduce vignetting or resolution fall-off at the edges. This is a component purchase, not a plug-and-play camera, and it suits buyers who understand CS mount compatibility, P-iris wiring, and back-focus adjustment.

What This Lens Actually Does

Who Buys This Model

• Security integrators replacing failed or underspecified lenses: When a camera body is serviceable but the original lens does not resolve 8MP or lacks P-iris, swapping in the HIK-HV3816P8MPIR restores the camera's full imaging capability without replacing the whole unit.
• Box camera builders specifying components individually: Installers assembling CS mount box cameras for traffic monitoring, retail analytics, or entry-point identification who need a varifocal lens matched to the sensor format.
• Upgrade installers moving existing cameras to 8MP: Sites stepping up from 2MP or 4MP camera bodies to 8MP bodies can use this lens to retain the same mounting position while gaining resolution, using the varifocal range to re-frame the scene.
• Technical buyers sourcing spares inventory: Larger installation companies and AV/security australia stocking replacement lenses for Hikvision box camera fleets where the CS mount P-iris connection is standard across multiple models.

Honest Assessment

The HIK-HV3816P8MPIR does what a purpose-built 8MP varifocal lens should: it covers the 1/1.8-inch sensor format without vignetting, delivers P-iris precision across the 3.8-16mm zoom range, and brings an F1.5 aperture that is genuinely useful for scenes with variable or low light. For integrators who work with CS mount box cameras regularly, having a lens rated to the sensor's full resolution is the difference between getting the pixel count on paper and getting it in the footage. The varifocal range is practical on site - 4 times zoom adjustment without changing the camera position covers a wide variety of distances and scene widths. What it will not do is motorise the zoom or iris for remote adjustment; both zoom and focus are manual, which means back-focus must be set on the bench or on the wall at installation. It is also strictly a component - buyers who want a ready-to-mount camera should look at Hikvision's integrated box camera range available through Security Australia.

Before You Buy

Quick Fit Check

• Good match if: You are building or repairing a CS mount box camera with an 8MP sensor and a P-iris-compatible camera body, and need a varifocal lens that fully covers the 1/1.8-inch format without resolution compromise.
• Good match if: Your installation requires field-adjustable focal length between 3.8mm and 16mm - for example, positioning a camera before confirming the exact scene framing - and you want an F1.5 aperture to maintain light-gathering capability at longer focal lengths.
• You may need a different model if: You need remote zoom or focus control - a motorised varifocal or integrated PTZ camera would be more appropriate for installations where physical access for manual adjustment is not practical after mounting.

Key Features & Technical Specifications

Real-World Scenarios

How It Compares

• Choose this if: You need a CS mount P-iris varifocal lens that fully resolves 8MP across a 1/1.8-inch sensor with an F1.5 aperture - particularly where precise iris control under variable lighting is a requirement of the camera firmware.
• You may need a different model if: Remote adjustment is required after installation - a camera with a built-in motorised varifocal or auto-focus lens would be more appropriate where physical access to the zoom and focus rings is impractical once the unit is mounted.
• Pairs well with: A CS mount 8MP P-iris-compatible box camera body with a matching 1/1.8-inch sensor and a weatherproof or indoor housing appropriate for the installation environment.

Common Questions

1. Will this lens work with any CS mount camera, or does it require a specific camera body?

   It requires a P-iris-compatible camera body - not just any CS mount camera. The CS mount physical fitting is universal across a wide range of cameras, but the P-iris iris motor requires a dedicated control connection and camera firmware support. Fitting this lens to a camera that only supports DC auto-iris will result in the iris not being controlled correctly. Confirm your camera body's iris control type before purchasing.

2. Does this lens support motorised zoom or auto-focus?

   No. Both zoom and focus are manual on the HIK-HV3816P8MPIR. The zoom ring must be physically set to the desired focal length, and the focus ring adjusted separately. Once both are locked, no remote adjustment is possible. This is standard for this lens category and is not a fault - but it does mean installation access must be available at setup.

3. What sensor size does this lens support, and does it matter?

   Yes, sensor format compatibility matters significantly. This lens covers a 1/1.8-inch image circle. If fitted to a camera with a smaller sensor format such as 1/2.7-inch or 1/3-inch, the lens will work but the field of view will be tighter than the focal length suggests due to the crop effect of the smaller sensor. If fitted to a sensor larger than 1/1.8-inch, vignetting will appear in the corners.

4. Why does the aperture rating matter for an 8MP surveillance lens?

   The F1.5 maximum aperture directly affects how much light reaches the sensor before the camera applies gain. At longer focal lengths within the 3.8-16mm range, the effective aperture narrows, so starting at F1.5 provides more usable light-gathering capacity than a typical F1.8 or F2.0 varifocal. In low-light or dusk conditions, this reduces digital noise and keeps 8MP detail readable in the recorded image.

5. How does P-iris differ from a standard DC auto-iris lens in practical use?

   P-iris holds the aperture at the optically optimal point - typically around F4 to F8 depending on conditions - rather than closing down as far as possible in bright light. A conventional DC auto-iris can over-close in direct sunlight, causing diffraction that softens the image even though the sensor is receiving adequate exposure. P-iris prevents this and maintains sharper detail, which matters most when the camera is tasked with 8MP identification-level footage. The lens is available through Security Australia for integrators specifying it as a component purchase.

6. Will this lens fit a C mount camera body with an adapter?

   Yes, with a C-to-CS adapter ring. The difference between CS and C mount is 5mm of flange-back distance. A CS lens fitted directly to a C mount body cannot reach focus because the flange distance is too short. Adding a 5mm C-to-CS adapter ring to the camera body corrects this and allows the lens to focus normally. This adapter is a separate purchase and is not included with the lens.

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