User manual

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D12 Camera Manual Part 1
Focal lengths of
MOBOTIX lenses are al-
ways 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 and thus leads to the designation
L22 for the
lens.
Since the image sensors in digital cameras have different sizes, con-
verting to 35mm camera format provides for better comparing the im-
age format and field of vision parameters of different lenses. Another
benefit is that you can easily set a 35mm camera (analog or digital) to
the same focal length (
Lxx ) to obtain the same field of vision. This ap-
proach greatly facilitates lens selection.
Lens Table
Order name
Original image
L22 L32 L43 L65 L135
35mm equivalent
Focal length
F-Number
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