NEF represents the extension typically associated with RAW images taken with Nikon cameras. Most professional photographers shoot in RAW mode because this allows them to make a series of adjustments during post-processing, including noise removal, white balance or the correction of under/overexposure without reducing the image quality. As opposed to JPEG or other compressed formats, which include predefined values for aspects such as white balance or brightness and color depth, RAW images allow the photographer more freedom in shaping how the final image will actually look.
The quick and simple way to handle your files is to get a quality piece of software, such as reaConverter. This software is extremely efficient in managing a wide range of batch conversions. As you will soon realize, reaConverter will help you avoid spending countless hours trying to figure out how to convert multiple NEF files as once.
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