ZEISS CP.3 XD Lens Correction: Workflow Overview

The CP.3 eXtended data (CP.3 XD) lenses by ZEISS provide extended metadata for digitally correcting images concerning optical shading and distortion deviations. Pomfort’s applications LiveGrade Pro and Silverstack provide functionality to leverage this extended metadata for on-set preview (LiveGrade Pro) and data management (Silverstack).

Use of eXtended Data in LiveGrade Pro and Silverstack XT / Silverstack Lab

The ZEISS eXtended data can be used for:

  • On-set preview with LiveGrade Pro
  • Extraction of recorded lens data and consolidation with clips in Silverstack XT and Silverstack Lab

The schematic overviews give you an idea of the on-set preview and lens data extraction use cases:

On-Set Preview of Lens Correction with LiveGrade Pro

LiveGrade Pro is able to receive realtime lens correction information from a ZEISS CP.3 XD lens that is connected to an Ambient MasterLockit Plus.

Functionality

The live signal of the camera is connected to a hardware capture device that is connected via Thunderbolt to the Mac running LiveGrade Pro in order to receive a live image in the application. Read the articles HD-SDI Setup for LiveGrade as well as SDI Recording and Frame Grabs for more information about live image capturing in LiveGrade.

LiveGrade Pro connects via Wifi or a tethered network connection to the MasterLockit Plus that receives live lens correction data from the ZEISS CP.3 XD lens. The live lens correction data can be applied to the captured live signal from the camera.

Learn more about the process in LiveGrade Pro in the article ZEISS CP.3 XD Lens Correction in LiveGrade Pro that offers a detailed description of the features.

Extraction and Display of Recorded Lens Data in Silverstack

Silverstack XT and Silverstack Lab allow to import, display and export lens correction data from ZEISS CP.3 XD lenses.

Functionality

The lens correction data is recorded in the MasterLockit Plus. Clips offloaded in Silverstack hold timecode information that matches the recorded lens data from the CP.3 XD lens. Silverstack can connect to the MasterLockit Plus via Wifi or a tethered network connection to receive the recorded lens data and to consolidate it with the clips in the Silverstack database. After that step, the lens correction can be reviewed in the Silverstack player.

Furthermore the correction data can be exported into ZLCFs (ZEISS Lens Correction Files) for consecutive production steps as e.g. the use in the  “ZEISS Lens Correction” plugin ZEISS provides for Blackmagic Design’s DaVinci Resolve.

Learn more about the process in Silverstack in the article ZEISS CP.3 XD Lens Correction in Silverstack that offers a detailed description of the functionalities.

Hardware Overview

ZEISS eXtended data can be recorded via an external LEMO compatible plug onto an Ambient MasterLockit Plus:

Exemplary Setup Using an ARRI Alexa Mini

  1. Connect the ZEISS CP.3 XD lens via the metadata cable to the grey ACN port of the MasterLockit Plus
  2. Connect the timecode cable from the TC port of the MasterLockit Plus to the TC port of the camera

Hardware Components for LiveGrade Pro Workflow

The following hardware components are involved:

  • ZEISS CP.3 XD lens
  • Camera
  • Ambient MasterLockit Plus
  • Cables
    • Lens data cable
    • Power cables
    • Metadata cables
    • Timecode cables
  • Apple Mac / Macbook (Pro)
  • Blackmagic Design UltraStudio Mini Recorder or similar recording device
    • Thunderbolt cable
    • HDMI or SDI cable
  • Software
    • Pomfort LiveGrade Pro

Hardware Components for Silverstack Workflow

The following hardware components are involved:

  • ZEISS CP.3 XD lens
  • Camera
  • Ambient MasterLockit Plus
  • Cables
    • Lens data cable
    • Power cables
    • Metadata cables
    • Timecode cables
  • Apple Mac / Macbook (Pro)
  • Software
    • Pomfort Silverstack XT or Silverstack Lab

Additional Information

What is eXtended Data?

ZEISS eXtended Data is a newly developed lens data technology. It is based on the Cooke /i technology and extends the functionality with additional information about the lens characteristics such as distortion and shading. The characteristics are calculated in real time for every focal point and effective T-stop. The lens data are transferred either directly to camera through 4-pin Cooke /i interface (PL mount) and / or to any supported equipment via external cable.