diff --git a/rtengine/dcraw.cc b/rtengine/dcraw.cc
index 9ae313530..b843404e5 100644
--- a/rtengine/dcraw.cc
+++ b/rtengine/dcraw.cc
@@ -2349,6 +2349,35 @@ void CLASS unpacked_load_raw()
 	&& (unsigned) (col-left_margin) < width) derror();
 }
 
+
+// RT
+void CLASS sony_arq_load_raw()
+{
+  int row, col, bits=0;
+  ushort samples[4];
+
+  while (1 << ++bits < maximum);
+  for (row=0; row < ((shot_select < 2) ? 1 : raw_height); row++) {
+    for (col=0; col < ((row == 0) ? raw_width : 1); col++) {
+      RAW(row,col) = 0;
+    }
+  }
+  for (row=0; row < raw_height; row++) {
+    int r = row + (shot_select & 1);
+    for (col=0; col < raw_width; col++) {
+      int c = col + ((shot_select >> 1) & 1);
+      read_shorts(samples, 4);
+      if (r < raw_height && c < raw_width) {
+          RAW(r,c) = samples[(2 * (r & 1)) + (c & 1)];
+          if ((RAW(r,c) >>= load_flags) >> bits
+              && (unsigned) (row-top_margin) < height
+              && (unsigned) (col-left_margin) < width) derror();
+      }
+    }
+  }
+}
+
+
 void CLASS sinar_4shot_load_raw()
 {
   ushort *pixel;
@@ -6524,6 +6553,17 @@ void CLASS apply_tiff()
 		   if (!strncmp(make,"OLYMPUS",7) &&
 			tiff_ifd[raw].bytes*7 > raw_width*raw_height)
 		     load_raw = &CLASS olympus_load_raw;
+                   // ------- RT -------
+                   if (!strncmp(make,"SONY",4) &&
+                       !strncmp(model,"ILCE-7RM3",9) &&
+                       tiff_samples == 4 &&
+                       tiff_ifd[raw].bytes == raw_width*raw_height*tiff_samples*2) {
+                       load_raw = &CLASS sony_arq_load_raw;
+                       colors = 3;
+                       is_raw = 4;
+                       filters = 0x94949494;
+                   }
+                   // ------------------
 	}
 	break;
       case 6:  case 7:  case 99:
diff --git a/rtengine/dcraw.h b/rtengine/dcraw.h
index 0a10f9732..5a2790801 100644
--- a/rtengine/dcraw.h
+++ b/rtengine/dcraw.h
@@ -409,6 +409,7 @@ sony_decrypt_t sony_decrypt;
 void sony_load_raw();
 void sony_arw_load_raw();
 void sony_arw2_load_raw();
+void sony_arq_load_raw(); // RT
 void smal_decode_segment (unsigned seg[2][2], int holes);
 void smal_v6_load_raw();
 
diff --git a/rtengine/pixelshift.cc b/rtengine/pixelshift.cc
index 256aaaf63..c2c0231a1 100644
--- a/rtengine/pixelshift.cc
+++ b/rtengine/pixelshift.cc
@@ -295,6 +295,43 @@ void calcFrameBrightnessFactor(unsigned int frame, uint32_t datalen, LUT<uint32_
 }
 
 
+class RawDataFrameReorder {
+public:
+    typedef array2D<float> *array2D_ptr;
+    RawDataFrameReorder(const std::string &model, array2D_ptr *rawDataFrames):
+        model_(model),
+        frames_(rawDataFrames)
+    {
+        if (model_ == "ILCE-7RM3") {
+            std::swap(frames_[2], frames_[3]);
+        }
+    }
+
+    ~RawDataFrameReorder()
+    {
+        if (model_ == "ILCE-7RM3") {
+            std::swap(frames_[2], frames_[3]);
+        }
+    }
+
+    unsigned int getframe(unsigned int frame)
+    {
+        if (model_ == "ILCE-7RM3") {
+            if (frame == 2) {
+                return 3;
+            } else if (frame == 3) {
+                return 2;
+            }
+        }
+        return frame;
+    }
+
+private:
+    std::string model_;
+    array2D_ptr *frames_;
+};
+
+
 }
 
 using namespace std;
@@ -307,6 +344,9 @@ void RawImageSource::pixelshift(int winx, int winy, int winw, int winh, const RA
         return;
     }
 
+    RawDataFrameReorder reorder_frames(model, rawDataFrames);
+    frame = reorder_frames.getframe(frame);
+
     RAWParams::BayerSensor bayerParams = bayerParamsIn;
 
     bayerParams.pixelShiftAutomatic = true;