User manual

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D22 Camera Manual Part 1
Focal lengths of
MOBOTIX lenses are
always given as compared
to a 35mm camera!
To determine the lens you
need, simply use a camera
with zoom lens to find a
matching MOBOTIX lens
Note
The focal lengths of MOBOTIX lenses do not reflect the actual focal
length of the lenses, but the focal length (
Lxx mm) converted to 35mm
camera format. For example, the MOBOTIX Super Wide-Angle lens has
an actual focal length of 4mm. This would be the equivalent of 22mm
on a 35mm camera. This lens is thus called
L22 .
Since the image sensors in digital cameras have different sizes, con-
verting to 35mm camera as a known format provides for better com-
paring the image formats and the fields of vision of the different len-
ses. Another benefit is that you can easily set a 35mm camera (ana-
log or digital) to the same focal length (Lxx) to obtain the same field of
vision. This approach greatly facilitates lens selection.
Lens Table
Order name
Original image
L22 L32 L43 L65 L135
35mm equivalent
Focal length
Aperture
Image angle horizontally
22 mm
4 mm
32 mm
6 mm
2,0
90°
2,0
60°
43 mm
8 mm
65 mm
12 mm
2,0
45°
2,0
31°
135 mm
25 mm
2.5
15°
Image angle vertically
Distance 1 m
• Image width
• Image height
67°
m
45°
m
2,0
1.3
1.1
0.8
Distance 5 m
• Image width
• Image height
Distance 10 m
m
10.0
m
5.7
6.6
m
4.1
m
34°
m
23°
m
0.8
0.6
0.5
0.4
11°
m
0.3
0.2
m
4.1
m
2.7
3.0
m
2.0
m
m
1.3
1.0
m
• Image width
• Image height
Distance 20 m
• Image width
20.0
13.3
11.5
8.2
m
40.0
m
23.0
• Image height
Distance 50 m
• Image width
• Image height
26.6
m
16.4
m
100.0
66.0
57.5
41.0
8.2
6.1
5.5
4.0
m
16.4
m
11.0
2.6
1.9
m
5.2
12.2
m
8.0
m
41.0
30.5
27.5
20.0
3.8
m
13.0
9.5