Hikvision HIK-HV1140P8MPIR Lens, 8MP P Iris, 11-40mm, F1.5 CS 1/1.8"

Model: HIK-HV1140P8MPIR

Who This Is For

When image precision across a wide range of distances is the priority, the standard fixed lens on a box or bullet camera often falls short. The Hikvision HIK-HV1140P8MPIR is a CS-mount varifocal lens built for integrators and security professionals who need the flexibility of an 11-40mm zoom range matched with P Iris aperture control on a sensor up to 1/1.8 inch at 8MP resolution. It suits scenarios where the camera position is fixed but the required field of view is not yet finalised during design - think building perimeters, car parks, loading zones, and long-corridor installations where focal length needs to be dialled in on-site. If you are running a Hikvision CS-mount box camera body and need a lens that keeps up with an 8MP sensor without sacrificing low-light performance, this lens addresses that directly.

What This Lens Actually Does

Who Buys This Model

• Security Integrators: Specifying CS-mount box camera builds for commercial sites where lens selection is done separately to the camera body, and P Iris compatibility is required by the camera firmware.
• Installers Upgrading Existing Box Cameras: Replacing an older or lower-resolution lens on a Hikvision CS-mount body that has been upgraded to an 8MP sensor, where the original lens was not rated for the new sensor format.
• Car Park and Perimeter Specialists: Working on sites where the camera mounting point is fixed but the exact coverage angle needs to be adjusted on-site - the 11-40mm range allows that without ordering a different lens.
• Operators Running 24-Hour Monitoring: Sites that rely on IR illumination overnight will benefit from the IR-corrected optics that prevent the focus shift and image softening that uncorrected lenses produce when IR activates.

Honest Assessment

The HIK-HV1140P8MPIR does what a purpose-built 8MP P Iris varifocal lens should do: it keeps the full resolution of the sensor usable across the frame, gives the camera firmware precise aperture control, and handles IR without focal shift. The F1.5 maximum aperture is a genuine advantage in marginal lighting. The 11-40mm range is wide enough to cover most fixed-camera applications on a single lens order. This is a component purchase - it solves a specific problem for integrators building or upgrading CS-mount box camera installations. It will not suit buyers looking for a complete camera unit, a PTZ solution, or wide-area panoramic coverage. It is also limited to CS-mount bodies; C-mount cameras require an adapter ring not included with this lens. The HIK-HV1140P8MPIR is available through Security Australia as a standalone lens accessory for professional builds.

Before You Buy

Quick Fit Check

• Good match if: You are building or upgrading a CS-mount Hikvision box camera running an 8MP sensor and the camera firmware supports P Iris control - this lens will use that connection properly and resolve the full sensor resolution.
• Good match if: The camera mounting position is fixed but the final field of view has not been confirmed - the 11-40mm varifocal range lets you adjust coverage on-site between approximately 55 and 14 degrees horizontal without swapping lenses.
• You may need a different model if: You need a complete camera unit rather than a standalone lens component - a varifocal turret, bullet, or motorised zoom camera may be more appropriate for your application and is worth reviewing at securityaustralia.com.au.

Key Features & Technical Specifications

Real-World Scenarios

How It Compares

• Choose this if: You need a CS-mount varifocal lens rated for 8MP sensors with P Iris control and IR correction - particularly for sites where the focal length needs to be adjusted on-site across a wide 11-40mm range.
• You may need a different model if: You need a lens with a shorter focal range for tight indoor spaces, or a longer telephoto range beyond 40mm for extreme-distance coverage - a different focal-length varifocal or a motorised zoom camera body may suit better.
• Pairs well with: Hikvision CS-mount box camera bodies with P Iris firmware support, paired with an appropriate IR illuminator for the intended detection range.

Common Questions

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

   The lens will physically fit any CS-mount camera body. However, the P Iris motorised aperture control requires the camera firmware to support P Iris communication. Non-Hikvision bodies or Hikvision bodies that only support DC iris will not drive the P Iris motor correctly. The lens will still pass an image, but the aperture will default to a fixed or uncontrolled state rather than the precision P Iris mode it is designed for.

2. Does this lens work for cameras larger than 8MP or with sensor formats bigger than 1/1.8 inch?

   No, not optimally. This lens is designed for sensors up to 8MP on a 1/1.8 inch format. On a larger sensor format, the image circle projected by the lens may not fully cover the sensor area, producing corner vignetting and reduced edge resolution. Confirm your camera body sensor format matches 1/1.8 inch or smaller before fitting this lens.

3. What field of view does the 11-40mm range actually give me in practice?

   At 11mm the horizontal field of view is approximately 55 degrees - wide enough for general area overview from a fixed mount. At 40mm it narrows to approximately 14 degrees horizontal, which suits longer-range coverage or scenes where you need more detail at distance. The zoom is manual; you set it during installation and lock the zoom ring rather than adjusting it remotely.

4. Why does IR compatibility matter on a lens, and does this lens actually address focal shift?

   Yes, this lens is IR-corrected. Standard glass optics focus visible light and infrared light at slightly different distances. When a camera switches to IR mode at night, an uncorrected lens shifts focus point slightly, causing the image to appear softer or out of focus even though nothing has moved. IR-corrected lenses use glass elements specifically selected to bring visible and IR wavelengths to the same focal plane, so the focus you set during the day holds through the night cycle.

5. Can I use this lens on a C-mount camera body without an adapter?

   No. CS-mount has a flange focal distance of 12.5mm; C-mount is 17.526mm. Fitting a CS-mount lens directly onto a C-mount body without a 5mm CS-to-C adapter ring will prevent the camera from achieving correct focus. The adapter ring is not included with this lens and needs to be sourced separately if you are working with a C-mount camera body.

6. How does P Iris differ from a standard auto-iris lens in real-world image quality terms?

   A standard DC auto-iris lens uses a simple voltage-driven motor with limited precision, and it typically opens as wide as possible in low light - which can reduce depth of field and introduce diffraction at very wide apertures. P Iris is controlled by the camera's image processor using a stepper motor, which allows the camera to select the optimal aperture for the scene rather than simply maximising it. The practical result is better depth of field in bright conditions and more consistent sharpness across the frame. Security Australia stocks this lens specifically for integrators who need that level of aperture control on 8MP CS-mount builds.

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