sony a 6400

Eifert@Aximmetry

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Hi David,

You can find information about camera calibration starting from here: https://aximmetry.com/learn/virtual-production-workflow/tracking/calibration/about-the-concept-of-camera-calibration/

Since it is unlikely that you can add a lens ~~tracking~~ encoder to a handheld camera, you will probably want to create a fixed FoV (Field of View) lens calibration. If you have any specific questions, please feel free to ask.

Warmest regards,

david libraty

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Thank you very much for your response, I want to know if I understood correctly, since I use a Sony a6400 camera, I can't use it for my anti-latency tracking?And if possible, what settings do I need to set so that the lens adjusts correctly with aximetry?

Eifert@Aximmetry

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Hi David,

Sorry for the confusion. When I said lens tracking, I was referring to a lens (zoom) encoder. Position tracking, such as what Antilatency provides, is a separate thing. You can easily mount Antilatency’s Alt tracker on handheld consumer cameras to track their position. However, installing a lens encoder on a handheld camera to track the camera's lens is more challenging, as it often requires attaching metal rods to the camera to secure the encoder.

If you are unable to use a lens encoder, you will need to perform a fixed Field of View (FoV) lens calibration. This requires you to keep your camera's zoom set to the exact value used during calibration. However, you can create multiple fixed FoV calibrations at different zoom levels and switch between them if you need to change the 6400's zoom between shoots.

Warmest regards,

david libraty

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Wow, thank you so much for your detailed answer, Is it possible to know what the basic calibration is for the Sony A6400, with its basic lens? Without any change in zoom? Because I see a bit of a gap between the virtual world and what the camera transmits

Eifert@Aximmetry

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Hi David,

I'm not entirely sure what you mean by the "gap" or "basic calibration".
However, one possible explanation is that the Zoom level you're using in Aximmetry is different from that of your camera. Another possibility is that the aspect ratio configured in Aximmetry's Preferences (Preferences → Rendering - Frame Size) does not match the aspect ratio your Sony camera is recording.

To accurately compare Zoom levels, it's best if you know your camera's Field of View (FoV). If that information isn't available, you can compare the Zoom (mm) values, provided you have correctly specified your Sony camera's sensor size in Aximmetry.

You can view both the FoV and focal length (in mm) by enabling the Lens option in the CAMERA control board:

sony a 6400

Note: You can override the Zoom or Sensor Size at any time in the INPUT panel.

Also, I recommend reviewing the Calibration section of the documentation, beginning here: https://aximmetry.com/learn/virtual-production-workflow/tracking/calibration/about-the-concept-of-camera-calibration/

Warmest regards,

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