Deathwarden Chanter - Armor rune question (Ghostwalk)

[Baldin]

Hi there,

I have a quick question. In a campaign I'm playing I play a Deathwarden Chanter. I have reached third level and choose the armor rune as my current Great Rune.
Now the text is as follows:
"When completed, the rune emanated a Magic Vestment spell to a radius of 5 feet, affecting all allies of the chanter within this emanation. The power of the rune lasts for 12 hours. A chanter can have only one of these runes in effect at any time; creating a second one causes the first one to dissipate."

Now my question is, how does this affect my allies? Does it apply to both their armor and their shield? Does it only apply to one?

Thanks in advance!
Cheers
Baldin