The Nikon D5300 is a new camera model and to edit its RAW format .NEF files you will need to update your software. The software included with the camera, ViewNX2, will open the RAW files, but it can only save them in JPEG or TIFF and has limited editing capabilities. You can purchase Nikon’s CaputreNX2, which offers more powerful editing.
Adobe software: You can now open the D5300 RAW files in Adobe Lightroom 5.3 and Photoshop CS6. Using the latest updates from Adobe, Lightroom 5.3 now supports the Nikon D5300. Adobe Camera RAW version 8.3 (used in Photoshop CS6) also supports the Nikon D5300. If you have Lightroom 4 or CS5 or earlier, it will not open the D5300 RAW files directly. You can use the DNG converter version 8.3 to convert to .DNG and then open using the old program versions.
There is also a work-around to open your D5300 .NEF file. You can modify the EXIF data in your images. By changing the camera model to something the program can understand, you will be able to open the RAW (.NEF) files and edit them as if they were taken by a different camera. The most similar model is the D7100, which the D5300 shares its sensor and also lacks the optical low pass filter. Use the ExifTool program to edit the EXIF data in your RAW (.NEF) files. First, download and install the ExifTool. Then go to your command prompt and navigate to your image folder. Enter the following command line:
exiftool.exe -model="NIKON D7100" *.NEF
This will change your image files so that the program will think they were taken using a D7100. You can then open and edit them in any program that can read the Nikon D7100 files.