Index: trunk/psModules/src/objects/pmPSF.h
===================================================================
--- trunk/psModules/src/objects/pmPSF.h	(revision 25754)
+++ trunk/psModules/src/objects/pmPSF.h	(revision 26893)
@@ -111,4 +111,11 @@
 psEllipseAxes pmPSF_ModelToAxes (psF32 *modelPar, double maxAR);
 
+/// Calculate FWHM value from a PSF
+float pmPSFtoFWHM(
+    const pmPSF *psf,                   // PSF of interest
+    float x, float y                    // Position of interest
+    );
+
+
 /// @}
 # endif