ZEISS Ventum 2.8/21

Lightweight industrial lens with E-mount for use with drones.

The ZEISS Ventum® 2.8/21 offers outstanding optical quality in a compact and rugged aluminum housing. The extremely fast, fixed-focal-length lens for Sony's E-Mount was primarily developed for use with drones. Lenses used for this purpose must be as small and light as possible, yet still offer outstanding image quality. Thanks to its compact design and the use of a fixed-focus setting, the weight of the ZEISS Ventum® 2.8/21 has been reduced by 50% compared to the Interlock Compact 2.8/21. This reduction in weight allows drones to fly longer, resulting in greater efficiency.

The lens is equipped with the E-Mount and is compatible with large area-scan and line-scan sensors with an image circle of up to 43 mm and a pixel size starting at 2.8 µm. The aperture can be adjusted on the lens by 1/3 f-stops from F2.8 to F22. The locking and torque of the aperture ring are designed to prevent accidental adjustment due to vibrations or the movement of the drone through the air.

ZEISS Ventum 2.8/21
ZEISS Ventum 2.8/21
ZEISS Ventum 2.8/21
ZEISS Ventum 2.8/21

Drones are important tools in modern surveillance applications, and will become increasingly common in the future. The ZEISS Ventum 2.8/21 offers unmatched data quality for applications such as cartography, creating three-dimensional models, inspections, surveys or monitoring project progress from the air.

The lens also provides reliable data in stationary applications such as the large-scale monitoring of events, power plants, open-cast mining, landfills or construction sites.

Lens Type Focal
Min. Free Working Distance Min. object distance Filter
Camera Mount

Ventum 2.8/21

21 mm



Fixed to 15m

M52 x 0.75


Stress Test

ZEISS lenses need to operate perfectly in extreme conditions, withstanding everything from scorching heat and bitter cold to sandstorms and severe vibrations. The video shows how ZEISS researchers systematically submit lenses to extreme stresses in order to arrive at findings that can help in future lens design and development. The video explains how a lens with fixing screws was tested regarding following norms:

  • DIN ISO 9022
  • DIN EN 60068-1: 1988-06
  • DIN EN 60068-2 Part 64: 2009-04
  • MIL-Std 810G
Rugged and Lightweight Housing

The high-quality aluminum housing is extremely rugged and both dust and weather-resistant (IP64). It is designed to prevent the ingress of even ultra-fine dust and is resistant to rain or splash water on all sides. As a result, the ZEISS Ventum 2.8/21 is ideal for outdoor use in extreme environmental conditions. Rain, fine sand, extreme temperatures, and high humidity are no problem for the wide-angle lens. In addition, eliminating electronic communication between the camera and lens saves weight and energy, allowing operators to perform even longer inspection flights.

Fixed Focus

The fixed focus close to the hyperfocal distance produces a large depth of field. This allows the pilot to fly the drone to different heights without having to worry about readjusting the focus. In addition, eliminating variable focus levels simplifies downstream data processing. Adjusting the aperture setting makes it possible to precisely adjust the depth of field in order to inspect closer objects in detail. Nevertheless, the focus of the image processing system remains unchanged. In the case of drones, this ensures that the stabilizer balances the drone consistently.

Exceptional image quality

The ZEISS Ventum 2.8/21 stands out as an extreme wide-angle lens with exceptional optical imaging correction. The lens offers unmatched levels of contrast, resolution, and color fidelity across the entire imaging area. This saves time and computing power during post-processing and also provides to more accurate data when calculating 3D models.

ZEISS T* Coating

The ZEISS T* coating was applied to every surface of the optical elements in the ZEISS Ventum 2.8/21. It prevents reflections and guarantees exceptional image quality, even under difficult lighting conditions.

ZEISS Industrial Lenses
ZEISS Industrial Lenses


ZEISS Ventum Lenses


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