I shot this Christmas Eve service on Ilford Delta 3200 at ISO 3200, f/5.6 at 1/60 on my Mamiya 7; developed in Tmax developer.

[IMG] img001.jpg by KentWebb, on Flickr[/IMG]

If you are shooting during the day with window light, you could probably get by at 1600, or use tri-X at 800-1600.

Any chance you could meter the church ahead of time?