Hi ! Question for MarkS - Focal Reducer Problem

[hgg]

Thank you for the graph!

The numbers show a better result, correct?
What exactly are these waves???   How do you interpret the graph?

From what I remember, the black areas are the ones that show perfect collimation, but they are
outside and around the center.   

George.

[RobertM]

The pink areas around the edge are bad and the central bulge is caused by the cluster you've imaged (that why it's better to have a random star field).  What you're after is it all an even colour (I think that'll be a darker shade of blue).

Robert

[Rocket Pooch]

Mac,

Can you run one of my QSI Images through the software?

Chris