Mobotix Lenses

Mobotix security camera lens names are specified by their 35mm equivalents, not by the actual focal length.  The Mobotix website reads:

“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, converting to 35 mm camera as a known format provides for better comparing the image formats and the fields of vision of the 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 approach greatly facilitates lens selection.”

Below is a table that aids in lens selection.

Mobotix Lens Table
(click on thumbnail to enlarge)
Lens –> L22 L32 L43 L65 L135
Original image Sample of the Mobotix L22 security camera lens. Sample of the Mobotix L32 security camera lens. Sample of the Mobotix L43 security camera lens. Sample of the Mobotix L65 security camera lens. Sample of the Mobotix L135 security camera lens.
35mm equiv. 22mm 32mm 43mm 65mm 135mm
focal length 4mm 6mm 8mm 12mm 25mm
Aperture 2 2 2 2 2.5
horiz. angle 90° 60° 45° 31° 15°
vert. angle 67° 45° 34° 23° 11°
1m distance
Image width 2m 1.1m 0.8m 0.5m 0.3m
Image height 1.3m 0.8m 0.6m 0.4m 0.2m
5m distance
Image width 10m 5.7m 4.1m 2.7m 1.3m
Image height 6.6m 4.1m 3m 2m 1m
10m distance
Image width 20m 11.5m 8.2m 5.5m 2.6m
Image height 13.3m 8.2m 6.1m 4m 1.9m
20m distance
Image width 40m 23m 16.4m 11m 5.2m
Image height 26.6m 16.4m 12.2m 8m 3.8m
50m distance
Image width 100m 57.5m 41m 27.5m 13m
Image height 66m 41m 30.5m 20m 9.5m

Here is a sample image from the Q24 Hemispherical camera (click to enlarge):

Mobotix Q24 Sample Image

Mobotix Q24 Sample Image