.NEF is the file created by the Nikon software. These are the raw image files and can be created only by the Nikon Cameras. The file contains every bit of info about the image before any kind of processing is done. The file even contains data like lens and camera model. Although these files are used for the Nikon Cameras but if you have proper Codec file, you will be able to view the NEF files by yourself. Also you can use Nikon software like ViewNX2 or CaptureNX2 to view those files on your PC. Some other 3rd party softwares like IrfanView, Adobe photoshop, Able RAWer, GIMP, etc. can also be used to view these .NEF files as well.
When you install one of the applications from the list of programs that you found here, you should be able to open or edit the file with the NEF extension without any issue. However, if you still have problems with this, you may use the option of NEF file conversion to a different format.
We hope we helped you solve the problem with the NEF file. If you do not know where you can download the application from our list, click on the link (which is the name of the program) - you will find more information there on the location where to download the secure setup version of the required application.
There can be more reasons which determine that you are not able to open the NEF file (apart from the lack of the proper application installed).
First - the NEF file may be incorrectly associated with the application installed to support it. In this case, you need to change this association by yourself. To do this, right-click on the NEF file that you want to edit, click "Open with" and then select the program from the list that you have installed. After this operation, the problems with opening the NEF file should be solved.
Second - the file you want to open can simply be damaged. Then, the best solution is to find a new version of given file, or download it again from the same source as before (maybe for some reason in the previous session the download of the NEF file has not been completed and it cannot be opened properly).
If you have additional information about the NEF file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on NEF file.