I was wrong about reverse coma. The inward bending of the curve in the outer part of the field just indicates complete correction of coma at longer f/ratios, not a backward bending of the curve.
I posted an inquiry about the discrepancy between what I was told and read about coma, and remarks by Bratislav, on another Forum.
Here is a link to that thread (you may have to cut and paste the entire link into your browser address bar):
http://www.cloudynights.com/ubbthrea...t=1&PHPSESSID=
I think reading the posts will fill you in on where the misunderstanding was, and point out that I believe that what we had here was a "failure to communicate".
This will be my final post on this subject on this Forum. Moderators should be more aware that ungentlemanly behavior on the part of participants should be remonstrated.