by Julieanne Kost
When importing images from a card, you can choose to “Copy as DNG” or simply “Copy” the files (and then convert to DNG later in your workflow). The reason that I choose to convert my RAW files to DNG after I finish editing my shoot is because I often delete several photographs from a shoot (perhaps as many as 25%). So for my workflow, it doesn’t make sense to waste the time converting the files that I will later trash: I prefer to select Library > Convert to DNG when I am finished editing the shoot.
Of course, if you never delete any photos, then it might make more sense for you to choose “Copy as DNG” on import.