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estudioh55001682
Participant
February 5, 2020
Question

Archivo .DNG muy pesado y sin preview

  • February 5, 2020
  • 3 replies
  • 314 views

Hola!

Cuando tengo un archivo .RAW en Lightroom que deseo editar en Photoshop (clonar, herramienta curita, etc, es decir ediciones un poco más complejas que curvas o sombras), se me duplica como un archivo .TIF y a la hora de exportarlo en LR en formato .DNG (formato que el cliente me pide para entregarle) no sólo pesa muchísimo (de 29mb pasa a 100mb por ejemplo) sino que el preview no se ve (sólo puedo ver la foto abriéndola con Camera Raw).

Lo que me gustaría resolver es sobre todo el tema del peso del archivo. 

Muchas gracias de antemano! 

This topic has been closed for replies.

3 replies

Rob_Cullen
Community Expert
Rob_CullenCommunity Expert
Community Expert
February 5, 2020

When you export the 100MB TIF file to a DNG, you are only 'enclosing' the TIF within a DNG 'wrapper', so the MB file size will be the same (or even larger).

Once the image is in the TIF RGB format there is no going back to a 'raw' DNG filetype.

You do have an option to use 'Lossy Compression' in the Export dialog, but you may not want any loss.

Other options are to work with 8bit TIF- again quality loss!

Or- Zip the TIF, which cam make a smaller 'zip' file, but that prevents the 'DNG wrapper'.

 

Why does the client want DNG?  Do they want the raw 'out of camera' image without edits?

Regards. My System: Windows-11, Lightroom-Classic 15.1.1, Photoshop 27.3.1, ACR 18.1.1, Lightroom 9.0, Lr-iOS 10.4.0, Bridge 16.0.2 .
    GoldingD
    GoldingD
    Legend
    February 5, 2020

    DNG (export) size, if, in the export dialog, you checked the Embed original RAW file, this will dramatically increase the file size.

     

    Not sure if, when the  original is a TIFF, if this applies

     

     

    DdeGannes
    Community Expert
    DdeGannesCommunity Expert
    Community Expert
    February 5, 2020

    David, I did some tests and do not understand the necessity of the DNG file format will achieve. After the creation of the tiff in Photoshop with the required edits will create a rendered file and not a raw file. When the tiff is exported to create the DNG the layers will be flattened. See the attached screen capture, which appears consistent with what I am seeing. And yes the resultant DNG will be larger than the raw file. 

     

    Regards, Denis: iMac 27” mid-2015, macOS 11.7.10 Big Sur; 2TB SSD, 24 GB Ram, GPU 2 GB; LrC 12.5,; Lr 6.5, PS 24.7,; ACR 15.5,; (also Laptop Win 11, ver 24H2, LrC 15.0.1, PS 27.0; ) Camera Oly OM-D E-M1.
    GoldingD
    GoldingD
    Legend
    February 5, 2020

    In the export dialog check the box "Add to the catalog".

     

    Or, after the export, sync the folder to import the ohoto into the catalog

     

     

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