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Small silver M12 varifocal lens with manual focus and zoom rings

Ruth's sister

Ruth's sister M12 2.8-12mm varifocal lens F1.4 internal power cable

SKU CH-7WAT-DKGKA

A 3.0MP M12 varifocal lens covering 2.8-12mm with manual focus, F1.4 aperture and 108° to 31.2° horizontal field

  • Wide 108° view covers large areas
  • F1.4 aperture gathers light for low-light scenes
  • Manual focus and zoom let you frame precisely
  • CE certified for safety compliance
  • Operates from −20 °C to +80 °C

M12 2.8-12mm Varifocal Lens

This M12-mount varifocal lens offers a 2.8-12mm focal range with a fixed F1.4 aperture for HD CCTV cameras. It supports 3.0 megapixel resolution and covers a horizontal field from 108 degrees down to 31.2 degrees. Manual focus and zoom rings allow precise framing for each installation. The lens fits 1/2.5 inch and 1/3 inch sensor formats with a 6.39mm back focal length.

Installers Needing Adjustable Coverage

The variable focal length suits installers who must set the exact viewing angle on site without swapping fixed lenses. IR transmission extends usability into low-light scenes. Buyers requiring auto-iris control or motorised zoom should look at alternative lens types because this model uses a fixed iris and manual adjustment only. The 0.2m minimum object distance limits extreme close-up work.

3.0MP Resolution with Wide Angle Range

At the wide end the 108-degree field covers large rooms or yards comfortably, while the 12mm setting narrows to 31.2 degrees for distant detail. The F1.4 aperture gathers ample light for the rated 3.0MP sensors. Performance drops when used on sensors larger than 1/2.5 inch or in temperatures outside the -20 to +80 degree Celsius operating range.

Highlights

  • Wide 108° view covers large areas
  • F1.4 aperture gathers light for low-light scenes
  • Manual focus and zoom let you frame precisely
  • CE certified for safety compliance
  • Operates from −20 °C to +80 °C

Specifications

No published specifications for this item yet.

Questions about this item

Does this M12 2.8-12mm varifocal lens mount directly onto my 1/2.5 inch format IP camera?

Yes, the lens uses a standard M12x0.5 thread and is specified as suitable for 1/2.5 inch IP cameras as well as 1/3 inch CCD chipsets.

Will the 108 to 31.2 degree horizontal field of view cover the same angles as my existing fixed lenses?

At 2.8mm the lens gives a 108 degree wide angle and at 12mm it narrows to 31.2 degrees, so it replaces several fixed focal lengths in that range.

How can I verify the iris stays fixed at F1.4 after I adjust focus and zoom manually?

The iris is fixed by design at F1.4; after setting focus and zoom, check that the aperture ring does not move and exposure remains constant across the zoom range.

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