Wow ,great photo. Very sharp. And the details are fantastic!
I am not a pro - the direct opposite :), but from my limited experience you need to get ISO up. With K-5 i raised it to 6400 while using on-board flash. It was enough to get da 40mm to f7 on...
I read somewhere on the net that it is done to allow easier work with bellows.But i do not own K-30 nor tried to use bellows with K-5 so really could not say if this is true.