I have received a new SB-28 for christmas :-) and tried to use it on my F-801 (N8008) in rear sync mode - but this does not seem to work :-( I understand that the SB-24 is capable to do it with the F-801. Is this true? And is there any possiblity to do rear and slow sync with the SB-28 as well? I hope that any one of you has a solution... Best, Christian