![]() ![]() An example of an Opcode List would be processing steps to autocorrect for camera lens defects. The most recent version of the DNG specification (1.3) added DNG Profiles and Opcode Lists that allow additional processing steps to be specified in an extensible manner. Backward Version allows you to choose either DNG specification 1.1 or 1.3, which is the default.The Custom DNG Compatibility dialog available from the Compatibility dropdown menu allows you to set three important DNG conversion options (see Figureįigure 3-10 Custom DNG Compatibility dialog box. You can use this option for your archived images just in case you need to retrieve the original raw files at some future date, but we suggest you turn it off for your working files to save space, because embedding the original raw file increases the file size considerably. Embed Original Raw File embeds a bit-for-bit copy of the original raw file in the DNG, from which it can be extracted at any time.We tend to stick with the Medium Size as our option. ![]() If you use a third-party application that relies upon the DNG preview for showing the image data, you should make sure you select one of the two preview sizes. Preview lets you choose whether or not to save an embedded preview and at what size.In the dropdown menu there is an item called Custom that allows you to select additional options. ![]() If you need the broadest compatibility as far back as Photoshop Lightroom CS2, choose Camera Raw 2.4 and later. If you save your DNG with the option of Camera Raw 5.4 and later, earlier versions of Camera Raw and Lightroom may not read the DNG file correctly.
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