My camera control software places the filter name into the FITS header of images and my analysis software automatically places filter names into reports. I am not sure what the correct names or abbreviations should be. I am using the following filters:
Clear (to be parfocal)
Sloan r' 2nd generation Astrodon
Sloan g' 2nd generation Astrodon
All the photometric filters are from Astrodon.
I then have three pretty picture filters (RGB), but they won't be involved in photometry.