# Run Calibration

When a good distribution has been achieved, it is a good idea to run the calibration process now and look at the error margin. To do so, press the ![](https://manula.r.sizr.io/large/user/17749/img/camera-calibration-wizard-play.png) icon.

{% hint style="info" %}
Depending the number of total images captures, this process might take some time.
{% endhint %}

After the calibration is completed, an error margin number would be displayed on each of the captured image. Also, an overall error would be given to a specific zoom/focus step.

{% hint style="info" %}
In an ideal situation, the error should be below 1.
{% endhint %}

If the error is higher than expected, try the following steps:

* review the already captured images and see if some are extremely high. If so, disable them and run the calibration again.
* capture more images at different angles / positions.

For more details of how to understand the calibration results, please refer to the Observations view.

### Continue with different zoom and/or focus step

{% hint style="warning" %}
The Lens Calibration tool need transition captures for calculate the nodal offsets for each single observation.
{% endhint %}

{% hint style="info" %}
The [Lens & Tracking Calibration](/grid/virtual-production/lens-and-tracking-calibration-wizard.md) doesn’t need transition captures to detect the nodal offsets.
{% endhint %}

{% hint style="warning" %}
For the transition capture the angle between screen and camera should be high as possible and needs to be fixed during this process.
{% endhint %}

1. For this transition capture, place the camera and/or screen to a place/distance such that the current AND next zoom/focus step can see and detect the markers on the calibration screen.
2. Check (by zooming in and/or change the focus) if the next observation can properly detect the markers of the screen.
3. Go back to the current zoom/focus values
4. make adjustments to the placement of the camera and the screen until both the current and the next zoom/focus step can properly detect the markers.
5. Lock the camera so it can´t move or rotate and don´t touch the screen at all, once both zoom/focus step can detect the markers.
6. Click on “Capture Next Step”\
   ![](/files/O9XJGBZMt6PKFLZKi6JE)\
   ![](/files/64NCwNlGURYCowaGTHuk)
7. Click on “Capture”
8. Change now to the next zoom/focus values for the next observation\
   ![](/files/NH9NzbjbCdzNCL0NVC2x)
9. Click on “Capture linked”\
   ![](/files/EGS79omZp0tY5DpNAdt6)
10. Click on “Continue”
11. Now continue capturing images and repeat all steps until the lens profile is done.

{% hint style="info" %}
By default the angle between camera and screen needs to be higher then 50°\
You can enable as overlay the “Grazing Angle” within the settings of the calibration wizard.
{% endhint %}

![](/files/5mMgPd04rIDDxjwyJxrN)

{% hint style="info" %}
It is possible to change the needed “Grazing Angle” within the settings of the wizard.
{% endhint %}

{% hint style="info" %}
It is always possible to add connection captures between observations.\
If later on an observation needs to be added between calibration points, these connection images needs to be add as well.\
Just choose one of the next calibration points and “connect” these.
{% endhint %}


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