Mobotix D26 Dome Manual page 87

Adjusting Lens Focus and Correcting Lens Distortion
Since activated lens distortion correction requires additional processing power, you should
consider disabling it in situations where it is not really necessary. You will only notice a
minimal distortion of the image, especially if you use the zoom. However, the maximum
frames rate for high resolution may be reduced, which means you have to choose between
maximum distortion correction or maximum frame rate.
Zoom without distortion correction Corrected image (zoom)
We recommend activating lens distortion correction, especially for applications with a low
frame rate and non-zoomed images (e.g. when using the D25 as a webcam). However, images
can usually be corrected at a later point in time when searching recorded images. This saves
on processing power during recording and increases the frame rate. The more you zoom in
on the image, the less distorted the image should appear.
Activate/Deactivate Lens Distortion Correction in the Browser
To activate this option, first specify the lens you are using in the Admin Menu > Camera
Administration > Lens Configuration dialog (this setting is saved until the camera is reset
to its default configuration). Select the B041 (4.0 mm) option from the Lens Type Selection
field and then click Apply followed by Restart.
Now select the Lens Distortion Correction option in the Display Mode Quick Control panel.
An automatically corrected (live) image is displayed that can be panned, tilted or zoomed.
Switching to the Full Image option will deactivate the automatic distortion correction function.
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