Access to FreeD Focus parameter?? FIZtrack

 

Hi,

I have a MARS FIZ.  For now I do not need zoom, and am working on a fixed lens, so I will not be using an 'adjustable' camera calibration.

However, with a fixed calibration, I cannot get my focus encoder to respond inside Aximmetry. 

I would just like the raw data, so that I can set my own focus range.  

Where can I find the raw focus data?

Best,

Jason

   JasonLashley

 
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Eifert@Aximmetry
  -  

Hi Jason,

With the Basic Calibrator, you can actually easily calibrate a focus range: https://aximmetry.com/learn/unlisted/for-users/basic-lens-calibration-without-lens-distortion/#focus-encoder
Note, that you can use your calibration file from the Camera Calibrator in the Basic Calibrator.


If you don't want to use the Basic Calibrator, and you want to calculate your focus range, then you can use the Focus Sensor pin in the Camera Tracking module. This pin outputs the raw focus data. While the Focus Distance pin will output the calibrated focus values of the Basic Calibrator:



In Tracked camera compounds, you can switch to Manual Lens in the INPUT and you can set a Manual Lens value:
However, this will also overwrite your tracked Zoom values.

If you want to dynamically control the focus based on the Focus Sensor pin (raw focus data), then you could use a Set Collection Scalar module with the Cam Focus Key pin to overwrite the focus before Unreal receives it:

Warmest regards,

 
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JasonLashley
  -  

Many thanks for your detailed response.  

I think my problem is that my calibrations are "Fixed FOV", as opposed to "Adjustable FOV", and I am not getting any values from Focus Value or Focus Sensor.    

So am I correct to assume that I need to recalibrate my lenses into Adjustable FOV to be able to receive Focal Data?

Is there a way to easily convert a Fixed Cal to an Adjustable Cal? 

 
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Eifert@Aximmetry
  -  

Hi,

Do you get values from the Focus Sensor pin if you use the Camera Tracking module without a Calibration Profile?
If you don't, then it is likely something is wrong with your physical setup. It could be for example that you plugged the focus encoder into the zoom encoder's slot.

If you get Focus Sensor values, then you could actually use that by connecting to the Cam Focus key:

Or you could add calibration points in the Basic Calibrator like in this link: https://aximmetry.com/learn/unlisted/for-users/basic-lens-calibration-without-lens-distortion/#focus-encoder
Note, that you should be able to do this with Fixed FOV too, you just add the focus calibration points with the same focal lengths.

Warmest regards,