Index: trunk/Mars/msimreflector/MFresnelLens.cc
===================================================================
--- trunk/Mars/msimreflector/MFresnelLens.cc	(revision 19605)
+++ trunk/Mars/msimreflector/MFresnelLens.cc	(revision 19606)
@@ -51,5 +51,5 @@
     fTitle = title ? title : "Parameter container storing a collection of several mirrors (reflector)";
 
-    fMaxR = 25;
+    fMaxR = 55/2.;
 }
 
@@ -227,5 +227,5 @@
     const double R = D/2;    // [cm] radius of lens
     const double w = 0.0100; // [cm] Width of a single groove
-    const double H = 0.18;   // [cm] Thickness
+    const double H = 0.25;   // [cm] Thickness (from pdf)
 
     // Focal length is given at this wavelength
@@ -256,4 +256,7 @@
     // Not 100% sure, but I think we have SC943
     // https://www.orafol.com/en/europe/products/optic-solutions/productlines#pl1
+
+    // From the web-page:
+    // Positive Fresnel Lenses ... are usually corrected for spherical aberration.
 
     // sin(omega) = R / sqrt(R^2+f^2)