I recently purchased a Rokinon 14mm lens and this lens supplies no information to the camera. Because of that the images I take contain no information about the lens or the focal length that was used to take the image. I was wondering if anyone knows of an EXIF editor that would allow me to supply that information to either the original raw file or a converted dng file.
Yes, I have good news for you.
I only recently discovered PhotoMe, it is declared as beta but it seems working very well and read/write a lot of metadata, it is freeware: