diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index d88892a3b..4f31d7539 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -1153,9 +1153,9 @@ CaptureSharpeningParams::CaptureSharpeningParams() :
     enabled(false),
     autoContrast(true),
     contrast(10.0),
-    gamma(1.35),
+    gamma(1.00),
     deconvradius(0.75),
-    deconviter(30)
+    deconviter(20)
 {
 }
 
diff --git a/rtgui/pdsharpening.cc b/rtgui/pdsharpening.cc
index 8e7c0e8b8..85d174df8 100644
--- a/rtgui/pdsharpening.cc
+++ b/rtgui/pdsharpening.cc
@@ -49,9 +49,9 @@ PdSharpening::PdSharpening() : FoldableToolPanel(this, "pdsharpening", M("TP_PDS
     pack_start(*hb);
 
     Gtk::VBox* rld = Gtk::manage(new Gtk::VBox());
-    gamma = Gtk::manage(new Adjuster(M("TP_SHARPENING_GAMMA"), 0.5, 6.0, 0.05, 1.35));
-    dradius = Gtk::manage(new Adjuster(M("TP_SHARPENING_EDRADIUS"), 0.4, 1.0, 0.01, 0.75));
-    diter = Gtk::manage(new Adjuster(M("TP_SHARPENING_RLD_ITERATIONS"), 5, 100, 1, 30));
+    gamma = Gtk::manage(new Adjuster(M("TP_SHARPENING_GAMMA"), 0.5, 6.0, 0.05, 1.00));
+    dradius = Gtk::manage(new Adjuster(M("TP_SHARPENING_EDRADIUS"), 0.4, 1.15, 0.01, 0.75));
+    diter = Gtk::manage(new Adjuster(M("TP_SHARPENING_RLD_ITERATIONS"), 1, 100, 1, 20));
     rld->pack_start(*gamma);
     rld->pack_start(*dradius);
     rld->pack_start(*diter);