The K25 suffix indicates raw image data generated by the digital Kodak DC25 camera.
The K25 files contain the unprocessed or minimally edited raw data of the image sensor. Although these RAW (raw) data are larger than the JPEG files stored by the device, they are more versatile.
These sometimes called "digital negative" raw data are excellent for post-processing such as the adjustment of the colors, correction of the exposure, suitable for sharpening or noise filter. They are indispensable for professional work or things like astrophotography.
In order to convert them into an RGB image format that can be commonly used, the data must be "developed". This means that processing steps such as interpolation and exposure as well as converting to a format such as PNG, PSD, TIFF or JPEG must be performed.
Most RAW files also contain metadata with information about the image and the recording conditions, in part also in the EXIF or IPTC standard.
Most often resolving problems with opening K25 files is very simple. Just install an appropriate program that supports such files. All of the listed programs support K25 files, but may vary in offered function and purpose. Some programs may be capable only of viewing contents of K25 files or offer file conversion options, but may not be capable of editing such files.
It is possible that although a compatible program has been installed on user’s system, it is not used by the system to open it. This may happen because no default application was associated with this type of files. To associate K25 files with given application, select "Open with" from drop-down menu (accessed by right-clicking on the file). Then select from the list the program or application you want to be used to open this type of file. If the Microsoft Windows Photos applications is not on the list, select "Browse" option in order to manually locate the directory where Microsoft Windows Photos has been installed.
Sometimes problems with opening K25 files may not lie with the application itself, but can arise due to other causes, such as: