30D won't focus w/o battery grip
I haven't had the problem (traded my 30D up to a 50D), but it sounds like the shutter switch might have a broken or marginal solder joint. Although I can't explain why it would work with the battery pack on. Is it be intermittent?
Can never hurt to have a spare battery, though.
|Umbrellas by pleytime|
from An A to Z of Subjects- Week 21, U
|Glass ball on a perforated metal plate _2 by harubux|