Get Simbad magnitudes for a source

I need to access the magnitudes in various filters for some sources, but am not sure how to do this. Simbad.list_votable_fields() includes an entry called 'flux(filtername)', but it is not clear how to use that. I have tried the following combinations, which all say there is no such field.

- Simbad.set_votable_fields('flux(V)') 
- Simbad.set_votable_fields('flux(v)')
- Simbad.set_votable_fields('fluxV')
- Simbad.set_votable_fields('V')
- Simbad.set_votable_fields('Vmag')

This is likely more of a documentation issue than needing to add the feature to the code, but can someone let me know how to get at least the V magnitude of a source?

Thanks!