Hi.

The zoom values should be embedded in the FreeD stream from your camera just like any other parameter (Pan/Tilt/....) and recognized by Axy.

You will have to calibrate your PTZ Camera though, so that Axy properly 'learns' the lens characteristics.

Cheers.

Eric.

So what equipment should I choose in the lens encoder?

Well, your best bet is to follow the instructions provided here:
https://aximmetry.com/learn/tutorials/for-studio-operators/camera-calibrator/

Make sure to have the calibration pattern printed on some sturdy surface (we used 6mm DiBond, which is tough as hell... :-)).
But foamboard should do fine as well.

The Calibrator pretty much talks you through the different steps. (Nice work, Axy!)

thank you