Lightroom
lets you convert camera raw files to DNG for archiving and taking
advantage of DNG features. When photos are converted to DNG, the
DNG files replace the originals in the catalog. You have the option
of deleting or preserving the originals on disk after the conversion.
With photos selected in the Grid view, or with
a selected photo in Loupe, Compare, or Survey view, choose Library >
Convert Photo(s) To DNG.
In the Convert Photo(s) To DNG dialog box, select any
of the following conversion option:
Only Convert RAW Files
Ignores photos that are not camera raw files. Deselecting
this option converts all selected photos, including JPEGs, TIFFs,
and PSDs.
Delete Originals After Successful Conversion
Deletes the original photo file after the conversion
process ends. Deselecting this option preserves the original file
on disk.
File Extension
Choose whether the file extension is .dng or .DNG.
JPEG Preview
Choose whether the exported JPEG preview is full sized,
medium sized, or not created.
Image Conversion Method
The image data is stored in the original “mosaic” format,
if possible, which maximizes the amount of data preserved. Mosaic
data can be converted to linear data but the reverse is not possible.
Choose Preserve Raw Image to store the mosaic data. Choose Convert
To Linear Image to store the image data in an interpolated (“demosaiced”)
format. The resulting image can be interpreted by other software
even if that software doesn’t have a profile for the digital camera
that captured the image.
Compressed (lossless)
Choose whether to use lossless compression, meaning that
no information is lost while reducing the file size.
Embed Original Raw File
Choose whether to store all of the original camera raw
data in the DNG file.
