diff --git a/rtdata/iccprofiles/Canon EOS 20D.icc b/rtdata/iccprofiles/Canon EOS 20D.icc
new file mode 100644
index 000000000..53b65e090
Binary files /dev/null and b/rtdata/iccprofiles/Canon EOS 20D.icc differ
diff --git a/rtdata/iccprofiles/Canon EOS-1D Mark III.icc b/rtdata/iccprofiles/Canon EOS-1D Mark III.icc
new file mode 100644
index 000000000..11271982a
Binary files /dev/null and b/rtdata/iccprofiles/Canon EOS-1D Mark III.icc differ
diff --git a/rtengine/dcraw.cc b/rtengine/dcraw.cc
index 61f3ac7d5..765400d95 100644
--- a/rtengine/dcraw.cc
+++ b/rtengine/dcraw.cc
@@ -6209,8 +6209,8 @@ void CLASS adobe_coeff (const char *make, const char *model)
 	{ 8197,-2000,-1118,-6714,14335,2592,-2536,3178,8266 } },
     { "Canon EOS 20Da", 0, 0,
 	{ 14155,-5065,-1382,-6550,14633,2039,-1623,1824,6561 } },
-    { "Canon EOS 20D", 0, 0xfff,
-	{ 6599,-537,-891,-8071,15783,2424,-1983,2234,7462 } },
+    { "Canon EOS 20D", 0, 0xfff,  /* RT */
+	{ 7590,-1646,-673,-4697,12411,2568,-627,1118,7295 } },
     { "Canon EOS 30D", 0, 0,
 	{ 6257,-303,-1000,-7880,15621,2396,-1714,1904,7046 } },
     { "Canon EOS 40D", 0, 0x3f60,
@@ -6243,8 +6243,8 @@ void CLASS adobe_coeff (const char *make, const char *model)
 	{ 6517,-602,-867,-8180,15926,2378,-1618,1771,7633 } },
     { "Canon EOS-1D Mark IV", 0, 0x3bb0,
 	{ 6014,-220,-795,-4109,12014,2361,-561,1824,5787 } },
-    { "Canon EOS-1D Mark III", 0, 0x3bb0,
-	{ 6291,-540,-976,-8350,16145,2311,-1714,1858,7326 } },
+    { "Canon EOS-1D Mark III", 0, 0x3bb0,  /* RT */
+	{ 7406,-1592,-646,-4856,12457,2698,-432,726,7921 } },
     { "Canon EOS-1D Mark II N", 0, 0xe80,
 	{ 6240,-466,-822,-8180,15825,2500,-1801,1938,8042 } },
     { "Canon EOS-1D Mark II", 0, 0xe80,
diff --git a/rtengine/dcraw.patch b/rtengine/dcraw.patch
index 6e8b5a4f5..46cc0929e 100644
--- a/rtengine/dcraw.patch
+++ b/rtengine/dcraw.patch
@@ -1,5 +1,5 @@
 --- C:/GCC/RT/RTSrc/rtengine/dcraw.c	Sun Oct 09 18:44:03 2011
-+++ C:/GCC/RT/RTSrc/rtengine/dcraw.cc	Mon Oct 10 19:12:06 2011
++++ C:/GCC/RT/RTSrc/rtengine/dcraw.cc	Tue Oct 11 19:52:42 2011
 @@ -1,6 +1,17 @@
 +/*RT*/#include <glib.h>
 +/*RT*/#include <glib/gstdio.h>
@@ -310,7 +310,7 @@
      if (parse_tiff (save+6)) apply_tiff();
      fseek (ifp, save+len, SEEK_SET);
    }
-@@ -6182,8 +6203,8 @@
+@@ -6182,30 +6203,30 @@
  	{ 4716,603,-830,-7798,15474,2480,-1496,1937,6651 } },
      { "Canon EOS 5D", 0, 0xe6c,
  	{ 6347,-479,-972,-8297,15954,2480,-1968,2131,7649 } },
@@ -321,7 +321,14 @@
      { "Canon EOS 10D", 0, 0xfa0,
  	{ 8197,-2000,-1118,-6714,14335,2592,-2536,3178,8266 } },
      { "Canon EOS 20Da", 0, 0,
-@@ -6196,16 +6217,16 @@
+ 	{ 14155,-5065,-1382,-6550,14633,2039,-1623,1824,6561 } },
+-    { "Canon EOS 20D", 0, 0xfff,
+-	{ 6599,-537,-891,-8071,15783,2424,-1983,2234,7462 } },
++    { "Canon EOS 20D", 0, 0xfff,  /* RT */
++	{ 7590,-1646,-673,-4697,12411,2568,-627,1118,7295 } },
+     { "Canon EOS 30D", 0, 0,
+ 	{ 6257,-303,-1000,-7880,15621,2396,-1714,1904,7046 } },
+     { "Canon EOS 40D", 0, 0x3f60,
  	{ 6071,-747,-856,-7653,15365,2441,-2025,2553,7315 } },
      { "Canon EOS 50D", 0, 0x3d93,
  	{ 4920,616,-593,-6493,13964,2784,-1774,3178,7005 } },
@@ -342,6 +349,17 @@
      { "Canon EOS 500D", 0, 0x3479,
  	{ 4763,712,-646,-6821,14399,2640,-1921,3276,6561 } },
      { "Canon EOS 550D", 0, 0x3dd7,
+@@ -6222,8 +6243,8 @@
+ 	{ 6517,-602,-867,-8180,15926,2378,-1618,1771,7633 } },
+     { "Canon EOS-1D Mark IV", 0, 0x3bb0,
+ 	{ 6014,-220,-795,-4109,12014,2361,-561,1824,5787 } },
+-    { "Canon EOS-1D Mark III", 0, 0x3bb0,
+-	{ 6291,-540,-976,-8350,16145,2311,-1714,1858,7326 } },
++    { "Canon EOS-1D Mark III", 0, 0x3bb0,  /* RT */
++	{ 7406,-1592,-646,-4856,12457,2698,-432,726,7921 } },
+     { "Canon EOS-1D Mark II N", 0, 0xe80,
+ 	{ 6240,-466,-822,-8180,15825,2500,-1801,1938,8042 } },
+     { "Canon EOS-1D Mark II", 0, 0xe80,
 @@ -6370,8 +6391,8 @@
  	{ 13690,-5358,-1474,-3369,11600,1998,-132,1554,4395 } },
      { "FUJIFILM FinePix F600EXR", 0, 0,