Zeiss Ventum 2.8/21 E 21mm F2.8 Fixed Focus and Manual Iris Lightweight E-Mount Lens, 43mm Image Circle, 42 MP Rated

ZEISS 2191-810
Typically 2-3 weeks
Current Stock:
  • excellent image quality, leading to highest data precision over the complete image field
  • fixed infinity focus setting
  • lightweight mechanical design with reduced moving parts
  • robust full-metal alloy housing
  • 50% weight reduction to comparable lens ZEISS Interlock Compact 2.8/21
  • splash-water and dust-resistant lens housing
  • covers line scan sensors up to 43 mm or are scan up to 24x36 mm2


Reduced Weight. Ventum® offers outstanding optical quality in a compact, lightweight and rugged aluminum housing with reduced moving parts. 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 and cost reduction.

Large format, high precision. The Ventum® E-mount is compatible with large area-scan and line-scan sensors with an image circle of up to 43 mm and a pixel size down to 2.8 µm. The locking and torque of the aperture ring are designed to prevent accidental adjustment due to in-flight vibration.

Better Data, not more data. Major drone manufacturers have designed their optic payloads based on the Sony Mirrorless E-mount cameras. The fixed infinity focus setting ensures precise details and accuracy needed for applications such as photogrammetry 3D imagery. The extremely fast Ventum®’s provides the highest data precision over the complete image field, thus producing better data, not more data.

In addition to E-mount lenses, ZEISS offers a wide variety of F-Mount, M-42 Mount and Canon Mount lenses for technical applications in complex production processes (Machine Vision) as well as in optical metrology, medical applications, traffic enforcement, quality assurance, sports and many other applications. Here they prove their outstanding image performance and reliability. Due to the precise manual adjustment of the helical focusing mount our partners will gain much better results than with comparable lenses.


Focal length

21 mm

Aperture range 

f/2.8 – f/22

Number of elements / groups 

11 / 9

Focus range (object to sensor) 

Fixed: set to ∞

Angular field (diag. / horiz. / vert.)

91° / 81° / 59°

Max. diameter of image field

43.3 mm (1.7")

Flange focal distance (in air)

18.0 mm (0.7”), E mount

Position of entrance pupil (relative to image sensor)

66.91 mm (2.63”)

Position of exit pupil (relative to image sensor)

39.28 mm (1.55”)


M 52 x 0.75

Length (without caps) 

67.8 mm (2.67”)

Diameter (max.) 

62.0 mm (2.44”)

Diameter (aperture ring) 

47.4 mm (1.87”)

Weight (without caps) 

227 g (0.5 lbs)

Camera mount 

E mount


291 g (0.64 lbs)

Camera mount

C mount

* referring to 24 x 36 mm format resp. 43 mm line





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