diff --git a/Nasal/view.nas b/Nasal/view.nas
index 6af58faa2..09244dd11 100644
--- a/Nasal/view.nas
+++ b/Nasal/view.nas
@@ -6,7 +6,7 @@
 var index = nil;    # current view index
 var views = nil;    # list of all view branches (/sim/view[n]) as props.Node
 var current = nil;  # current view branch (e.g. /sim/view[1]) as props.Node
-
+var fovProp = nil;
 
 var hasmember = func(class, member) {
 	if (contains(class, member))
@@ -235,6 +235,7 @@ var manager = {
 			me.current.handler.start();
 		if (hasmember(me.current.handler, "update"))
 			me._loop_(me.loopid += 1);
+		resetFOV();
 	},
 	reset : func {
 		if (hasmember(me.current.handler, "reset"))
@@ -638,7 +639,61 @@ var point = {
 
 
 
-var fovProp = nil;
+##
+# view.ScreenWidthCompens: optional FOV compensation for wider screens.
+# It keeps an equivalent of 55° FOV on a 4:3 zone centered on the screen
+# whichever is the screen width/height ratio. Works only if width >= height.
+#
+# status: 0=Init, 1=toggle option, 2=waiting for the window size to change. 
+
+var defaultFov = nil;
+var oldW = 0;
+var oldH = 0;
+var fovStore = {};
+
+var screenWidthCompens = func(status) {
+	var opt = getprop("/sim/current-view/field-of-view-compensation");
+	if (status == 0) {
+		defaultFov = getprop("/sim/current-view/config/default-field-of-view-deg");
+		forindex (var i; views) {
+			var defaultFovNode = views[i].getNode("config/default-field-of-view-deg", 1);
+			fovStore[i] = defaultFovNode.getValue();
+		}
+	} elsif (status == 1) {
+		opt = ! opt;
+		setprop("/sim/current-view/field-of-view-compensation", opt);
+		if (! opt) {
+			forindex (var i; views) {
+				var defaultFovNode = views[i].getNode("config/default-field-of-view-deg", 1);
+				defaultFovNode.setValue(fovStore[i]);
+			}
+			var vn = getprop("/sim/current-view/view-number");
+			setprop("/sim/current-view/field-of-view", fovStore[vn]);
+		}
+	} elsif (status == 2 and ! opt) {
+		return;
+	}
+	var w = getprop("/sim/rendering/camera-group/camera/viewport/width");
+	var h = getprop("/sim/rendering/camera-group/camera/viewport/height");
+	if (! opt) {
+		setprop("/sim/current-view/config/default-field-of-view-deg", defaultFov);
+		return;
+	}
+	if ( w != oldW or h != oldH or status == 1) {
+		oldW = w;
+		oldH = h;
+		d = 1.28066 * h; # 1.28066 = 4/3 (width/height ratio) / 2 / tan(55°)
+		newFov = 2 * math.atan2( w / h * h / 2, d) * R2D;
+		setprop("/sim/current-view/config/default-field-of-view-deg", newFov);
+		forindex (var i; views) {
+			var defaultFovNode = views[i].getNode("config/default-field-of-view-deg", 1);
+			defaultFovNode.setValue(newFov);
+		}
+		fovProp.setValue(newFov);
+	}
+	settimer(func { screenWidthCompens(2); }, 1);
+}
+
 
 
 _setlistener("/sim/signals/nasal-dir-initialized", func {
@@ -654,6 +709,7 @@ _setlistener("/sim/signals/nasal-dir-initialized", func {
 	manager.init();
 	manager.register("Fly-By View", fly_by_view_handler);
 	manager.register("Model View", model_view_handler);
+	screenWidthCompens(0);
 });
 
 
diff --git a/gui/dialogs/view.xml b/gui/dialogs/view.xml
index 1bd235bd3..7ef301cfb 100644
--- a/gui/dialogs/view.xml
+++ b/gui/dialogs/view.xml
@@ -87,6 +87,25 @@
 		</checkbox-template>
 	</group>
 
+	<hrule/>
+	<group>
+		<layout>hbox</layout>
+		<checkbox>
+			<property>sim/current-view/field-of-view-compensation</property>
+			<live>false</live>
+					<binding>
+						<command>nasal</command>
+						<script>view.screenWidthCompens(1)</script>
+					</binding>
+		</checkbox>
+		<text>
+			<label>Compensate Field of View for wider screens</label>
+		</text>
+	</group>
+
+
+
+
 	<hrule/>
 
 	<button>
diff --git a/preferences.xml b/preferences.xml
index 80b324d84..f1dad9956 100644
--- a/preferences.xml
+++ b/preferences.xml
@@ -153,7 +153,7 @@ Started September 2000 by David Megginson, david@megginson.com
 			<mie type="float" userarchive="y">0.003</mie>
 			<rayleigh type="float" userarchive="y">0.0003</rayleigh>
 			<dome-density type="float" userarchive="y">0.5</dome-density>
-			<!-- multithreading-mode>AutomaticSelection</multithreading-mode -->
+			<multithreading-mode>AutomaticSelection</multithreading-mode>
 			<!--
      Uncomment the above element to select OSG multi-threading mode.
      This may improve performance on multi-core, multi-CPU
@@ -346,6 +346,7 @@ Started September 2000 by David Megginson, david@megginson.com
 		<speed-up type="double">1.0</speed-up>
 		<current-view>
 			<field-of-view type="double">55.0</field-of-view>
+			<field-of-view-compensation type="bool" userarchive="y">false</field-of-view-compensation>
 			<aspect-ratio-multiplier type="double">1.0</aspect-ratio-multiplier>
 			<dynamic-view type="bool" userarchive="y">false</dynamic-view>
 		</current-view>