Index: trunk/Ohana/src/relphot/src/StarOps.c
===================================================================
--- trunk/Ohana/src/relphot/src/StarOps.c	(revision 34439)
+++ trunk/Ohana/src/relphot/src/StarOps.c	(revision 34440)
@@ -651,5 +651,5 @@
 
 	  // get the zero point for the selected image
-	  float zp = Mcal + Mmos + Mgrid + PhotZeroPoint (&catalog[Nc].measure[m], &catalog[Nc].average[j], &catalog[Nc].secfilt[j*Nsecfilt]);
+          float zp = PhotZeroPoint (&catalog[Nc].measure[m], &catalog[Nc].average[j], &catalog[Nc].secfilt[j*Nsecfilt]) - (Mcal + Mmos + Mgrid);
 
 	  // flux_cgs : erg sec^1 cm^-2 Hz^-1