diff --git a/devices/img.properties b/devices/img.properties
index ab3b06f..899a966 100644
--- a/devices/img.properties
+++ b/devices/img.properties
@@ -1,8 +1,8 @@
-#Tue Sep 20 14:24:19 CEST 2016
+#Wed Sep 21 11:54:07 CEST 2016
 colormap=Grayscale
 colormapAutomatic=false
-colormapMax=255.0
-colormapMin=0.0
+colormapMax=NaN
+colormapMin=NaN
 flipHorizontally=false
 flipVertically=false
 grayscale=false