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Metallic CS-mount CCTV lens, varifocal 2.9-8.2mm f1.0, manual rings, DC auto iris

Computar Ganz

Computar Ganz TG3Z2910FCS-IR CCTV Camera Lens 2.9-8.2mm f1.0 Varifocal DC Auto Iris CS Mount Day/Night IR

SKU CH-Q9DD-Q8ZVD

Varifocal 2.9-8.2mm f1.0 lens for 1/3" CS-mount cameras with DC auto iris and IR-corrected optics for day/night surveillance

  • Varifocal 2.9-8.2mm range lets you frame the scene without moving the camera
  • Bright f/1.0 aperture gathers maximum light for clear low-light surveillance
  • IR-corrected optics eliminate focus shift when the camera switches to night mode
  • DC auto iris automatically adjusts exposure from bright daylight to darkness
  • All-glass aspherical elements in a metal barrel deliver sharp, durable performance

CCTV lens for CS-mount 1/3" cameras

The Computar Ganz TG3Z2910FCS-IR is a varifocal lens built for CS-mount cameras using 1/3" format sensors. It covers a 2.9-8.2mm focal range with a bright f/1.0 maximum aperture. Manual zoom and focus rings let installers adjust the field of view without repositioning the camera. The DC auto iris automatically controls exposure across changing light levels.

IR-corrected optics remove focus shift

All-glass aspherical elements are IR-corrected so the focal plane stays consistent when the camera switches to night mode under infrared illumination. This eliminates the focus shift and infrared bleed that degrade image sharpness on standard lenses. Locking set screws secure the chosen zoom and focus positions against vibration. A durable metal barrel and mount withstand repeated handling during setup.

Limited to 1/3" format and CS mount

The lens is designed exclusively for 1/3" sensors; larger formats will vignette or under-utilise the image circle. CS-mount spacing is required, so C-mount cameras need an adapter ring not supplied here. The f/1.0 to 360C aperture range handles low light and bright scenes but does not extend beyond the specified iris control. Focus operates from 0.5 m to infinity; subjects closer than 0.5 m cannot be brought into sharp focus.

How it compares

Measured against everything we stock in Analog Video Security Cameras, at today’s prices. Recalculated every night.

Price $59.99
Cheaper than about 76% of the 1,032 comparable items (median $119.99).

Specifications

Product
Brand nameComputar Ganz
Model nameTG3Z2910FCS-IR

Questions about this item

Will the focus or iris mechanism need periodic adjustment?

The lens has locking set screws on the zoom and focus rings so the settings stay fixed after installation.

What stops the iris from opening wider than f/1.0 in very bright scenes?

The aperture range is f/1.0 to 360C, and the DC auto iris is driven by the camera to hold exposure within that range.

Does the metal barrel get hot enough to affect focus during all-day operation?

The all-glass optics and metal barrel are IR-corrected to eliminate focus shift when the camera switches between day and night modes.

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