Optimal Photometry

Optimal Photometry for CMDs - Aims and Achievements

Obviously the most accurate and precise photometry and astrometry possible, with realistic errors. This is why we use optimal photometry.
We do not throw away any object, but use data flagging.
But do flag any even slightly dubious object.
Rigorous procedures for assessing completeness.
Rigorous checking of final results to show our errors and completeness are actually correct.
Software which is quick and easy to use.
Sensible archiving of code so questions about old reductions of data can be addressed.