Data Quality
6dF capable of taking excellent data - average S/N > 10/pixel in both V and R in 1 hour + 1/2 hour, 10-20 objects/frame with electrons/pixel in V.
Poor acquisition, robot calibration, seeing or transparency can easily halve S/N or worse
No real-time S/N calculator developed yet.
Large fraction of data compromised by either observational or instrumental problems.
Data quality and consistency generally improving.
Concern over whether quality is good enough for Dn-s.