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LDT- M1 User Manual 

3 

 

 

Physical Connections

 

Name 

Type 

Description 

Cable Codes 

ETH 

10-pin 1B Lemo 

Ethernet to RJ-45 
computer 
connection 

ETHA 

LDE 

12-pin S103 Fischer

 

Lens data encoder 
connection port for 
LDT-E1 and Arri 
LDE-1

 

LDE, LDE-1 
embedded cable

 

SERIAL 

4-pin 0B Lemo 

Serial passthrough 
connection port 

CT 

MDR 

4-pin 0B Lemo 

Preston MDR Serial 
connection port 

MDR, MDRP 

CAM 

4-pin 0B Lemo 

LBUS connection to 
camera 

LBUS 

 

Cable Types and Codes 

All DCS cables are categorized using a code and a bend relief color for each of the cable 
types. Cables have two default lengths, 12 or 18 inches and the connector type can be 
straight (S), right angle (R), or anglissimo (O). Custom cables can be made upon 
request. 
 

Code 

Bend 

Relief 

Color 

Type 

 

Port Name 

Description 

ETHA 

Black 

10-Pin 1B Lemo 
to RJ-45 
 
ETH 

ETHA cable connects the LDT-M1 to a 
computer for firmware updating. 

 

 

 

 

 

Содержание LDT-M1

Страница 1: ...LDT M1 User Manual 11 02 2020 ...

Страница 2: ... connection to the camera through the LBUS on the lens mount If a lens mount is being used which does not have the LBUS connection the LDT M1 cannot record metadata If this is the case contact DCS and ask about the LDT R1 which can record the lens data on an SD card Please note LDT M1 works with the Preston system but in order to create a lens table a WCU 4 handset is required LDT M1 Components Ad...

Страница 3: ... Preston MDR Serial connection port MDR MDRP CAM 4 pin 0B Lemo LBUS connection to camera LBUS Cable Types and Codes All DCS cables are categorized using a code and a bend relief color for each of the cable types Cables have two default lengths 12 or 18 inches and the connector type can be straight S right angle R or anglissimo O Custom cables can be made upon request Code Bend Relief Color Type Po...

Страница 4: ... MDRP cable connects the LDT A1 to a Preston MDR 2 or 3 serial port Also provides power LBUS Red 4 pin 0B Lemo to 4 pin 0B Lemo CAM LBUS cable connects LDT M1 to the LBUS port of the Alexa Mini Mini LF camera It injects the encoded data into the RAW file Setting up the Preston The Preston MDR must be running firmware 1 15 or later please update your MDR first In order to correctly create lens maps...

Страница 5: ...owing Choose MENU Monitoring SDI SDI processing Overlays Status components Tick on Lens data Rigging the camera Connect the LDT M1 using the MDR Blue Cable from the MDR port on the LDT M1 to Serial 1 on the Preston MDR 3 Plug the LBUS Red cable from the CAM port on the LDT M1 to the LBUS Port on the lens mount of the Alexa Mini Turn off the Arri WCU 4 handset Connect the Preston Hand unit to the M...

Страница 6: ...g a New Lens Table Creating a lens table is essential to the encoding process It requires inputting the relevant lens information lens name brand serial number etc and then inputting all of the marks from each axis focus iris zoom for each lens The following guide explains this process Creating a New Lens Table Mapping a new lens table is crucial to ensuring that the data encoded throughout the pr...

Страница 7: ...tors connected by operating the WCU 4 Do not move Preston Motors or change direction while encoding the lenses unless required by rigging purpose Remember to insert an SD card into the slot of the WCU 4 before starting Always calibrate the lens from the LDT M1 calibration button The directions of the Focus Iris and Zoom axis on the WCU 4 may have to be changed to match the direction of the Preston...

Страница 8: ...r the lens serial number use the zoom stick to highlight a number and press the user button to select it Press the delete button to delete the last number Press the OK button once the serial number is complete Select the unit of measurement for focus use the up and down buttons or the zoom stick to select metric or imperial and then press the OK or User button to confirm Mapping a Lens Table Once ...

Страница 9: ...on the lens and press the OK or user button to confirm and repeat until all the desired marks are entered When finished press the OK button or the Finish button Mapping the Zoom Axis If encoding a zoom lens press the Zoom button Use the zoom stick to move through the span of the axis ensuring that it reaches each end of the lens If not check if there were any slips during calibration Use the iris ...

Страница 10: ...o MENU LENS DATA LENS PROGRAMMING EDIT LENS FILE Use the UP and DOWN soft buttons or the zoom stick to scroll through the list of lens files on the SD card Press the SELECT soft button or the User button to select a lens file On the following screen use the FOCUS IRIS or ZOOM soft button to select the lens scale to edit If metric and imperial scales exist select the scale unit first The following ...

Страница 11: ... screen Press the SAVE soft button to save the lens file to SD card folder ARRI ALEXA LDA You can edit the lens name before saving Using a Lens Data Encoder Usually camera operators like to have a manual control of zoom instead of controlling it by using a motor A lens encoder can be used instead in order to avoid the friction of a motor allowing the axis to spin free and be able to achieve valuab...

Страница 12: ...cture on the SD card and select a lens file Press SEND to transmit the lens file wirelessly to the camera device The transferred lens file is activated immediately If the lens file transfer does not work wirelessly then you need to use a computer to transfer the lens file from the WCU 4 SD Card to a USB Drive and place it inside the LDA folder Then load the files into the camera Testing the Lens T...

Страница 13: ...low focal length green display the trend of the axis through the shoot If these lines are missing the encoding was not successful Shooting a Test When shooting test footage allow approximately one hour per camera type being used on the production A test will involve recording the metadata with a camera and recording a separate feed from the camera with an overlay to verify the data is correct at t...

Страница 14: ...ns is user defined at the time of encoding Lens Serial Number its a static metadata that display the serial number of the lens Lens Distance Unit flag if the unit is inch or mm Lens Focus Distance Distance in the specified focus unit 1 1000 inch or mm Lens Focal Length Focal length in 1 1000 mm Lens Iris Calculated regular T stop value from the Lens Linear Iris value CODE How to extract FbF data o...

Страница 15: ... compatibility 1 02 2019 02 22 Forced user calibration when using WCU4 1 03 2019 03 20 No changes 1 04 2019 06 06 LDT A1 lens table match 1 05 2019 07 31 Cinetape bugfix 1 06 2019 09 11 Light Ranger support 1 07 2020 01 09 Preston calibration bug solved CAL button 1 08 2020 01 16 Mini LF support Camera can calibrate MDR too 2 01 2020 07 23 Tester compatibility ...

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