Page 1
ZEISS Ventum 2.8/21
Features
• 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
Camera Mount
Available with
E mount
04/19 · Subject to change Carl Zeiss AG · www.zeiss.com/automatedimaginglenses
Page 2
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 length (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”)
Filter-thread
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
* referring to 24 x 36 mm format resp. 43 mm line
ZEISS Ventum 2.8/21
Technical Specifications
04/19 · Subject to change Carl Zeiss AG · www.zeiss.com/automatedimaginglenses
Page 3
ZEISS Ventum 2.8/21
Relative Illuminance
E [%]
The relative illuminance shows
the image brightness over the
image height u’ in relation to the
image center.
f-number = 2.8
f-number = 4
f-number = 5.6
Relative Distortion
V [%]
The relative distortion shows the
deviation of the image height from
the expected image height u’ in
percent.
04/19 · Subject to change Carl Zeiss AG · www.zeiss.com/automatedimaginglenses
Page 4
F-Number 2.8
F-Number 5.6
ZEISS Ventum 2.8/21
MTF Charts
The Modulation Transfer (MTF) as a
function of image height (u) and slit
orientation (sagittal, tangential) has been
measured with white light at spatial
frequencies of R = 10, 20 and 40
cycles/mm.
__ Sagittal
… Tangential
__ Sagittal
… Tangential
04/19 · Subject to change Carl Zeiss AG · www.zeiss.com/automatedimaginglenses
Page 5
[m]
* Depth of field table for sensor format 24x36mm, circle of confusion 0.015mm (D/3000), rounded to 0.01m
ZEISS Ventum 2.8/21
Depth of Field (DOF)*
f/2.8 f/4 f/5.6 f/8 f/11 f/16 f/22
from to from to from to from to from to from to from to
6.38 INF 5.13 INF 4.07 INF 3.11 INF 2.40 INF 1.66 INF 1.05 INF
04/19 · Subject to change Carl Zeiss AG · www.zeiss.com/automatedimaginglenses
Loading...