diff --git a/src/src/UI/Manager/ImageViewManager.cpp b/src/src/UI/Manager/ImageViewManager.cpp
index 026ca60..8ea3bec 100644
--- a/src/src/UI/Manager/ImageViewManager.cpp
+++ b/src/src/UI/Manager/ImageViewManager.cpp
@@ -236,7 +236,7 @@ void ImageViewManager::viewPaned(DicomImageView *src, void* offsetVector) {
                     double vector[3] = {d[3] - d[0], d[4] - d[1], d[5] - d[2]};
                     v->applyPanOffset(vector);
                 }
-            }, src, offsetVector, ImageViewManager::SameStudySeries);
+            }, src, offsetVector, ImageViewManager::SameOrientationSeries);
         } else if (SyncHelper::getSyncState() == AUTO_SYNC) {
             this->smartDo([](auto v, auto callData) {
                 if (v->hasSeries()) {
@@ -249,14 +249,24 @@ void ImageViewManager::viewPaned(DicomImageView *src, void* offsetVector) {
     }
 }
 
-void ImageViewManager::viewZoomed(DicomImageView *src, double scaleFactor) {
+void ImageViewManager::viewZoomed(DicomImageView *src, double* scaleFactor) {
     if (SyncHelper::getSyncItem(ZOOM_PAN)) {
-        this->smartDo([](auto v, auto callData) {
-            if (v->hasSeries()) {
-                double d = *(double *) callData;
-                v->setZoomScale(d);
-            }
-        }, src, &scaleFactor, ImageViewManager::SameStudySeries);
+        if (SyncHelper::getSyncState() == MANUAL_SYNC){
+            this->smartDo([](auto v, auto callData) {
+                if (v->hasSeries()) {
+                    double* d = ((double *) callData);
+                    v->setZoomFactor(d[1]/d[0]);
+                }
+            }, src, scaleFactor, ImageViewManager::SameOrientationSeries);
+        }
+        else if (SyncHelper::getSyncState() == AUTO_SYNC) {
+            this->smartDo([](auto v, auto callData) {
+                if (v->hasSeries()) {
+                    double d = ((double *) callData)[1];
+                    v->setZoomScale(d);
+                }
+            }, src, scaleFactor, ImageViewManager::SameStudySeries);
+        }
     }
 }
 
diff --git a/src/src/UI/Manager/ImageViewManager.h b/src/src/UI/Manager/ImageViewManager.h
index 88f4164..5160c47 100644
--- a/src/src/UI/Manager/ImageViewManager.h
+++ b/src/src/UI/Manager/ImageViewManager.h
@@ -68,7 +68,7 @@ public:
 
     void viewPaned(DicomImageView *src, void* offsetVector);
 
-    void viewZoomed(DicomImageView *src, double scaleFactor);
+    void viewZoomed(DicomImageView *src, double* scaleFactor);
 
     void viewEndWindowLevel(DicomImageView *src, double level, double window);
 
diff --git a/src/src/UI/Widget/ImageView/dicomimageview.cpp b/src/src/UI/Widget/ImageView/dicomimageview.cpp
index 1968f77..6cfaa54 100644
--- a/src/src/UI/Widget/ImageView/dicomimageview.cpp
+++ b/src/src/UI/Widget/ImageView/dicomimageview.cpp
@@ -415,8 +415,7 @@ void DicomImageView::dispatchEvent(vtkObject *, unsigned long eid, void *callDat
             break;
         }
         case (ActorDraggableInteractorStyle::DraggableStyleEvents::EndDollyEvent):{
-            double newScaleFactor = ((double *) callData)[1];
-            emit onEndZoom(this, newScaleFactor);
+            emit onEndZoom(this, (double *) callData);
             break;
         }
         case (ActorDraggableInteractorStyle::DraggableStyleEvents::SlicedEvent): {
@@ -483,6 +482,14 @@ void DicomImageView::setZoomScale(double scale) {
     }
 }
 
+void DicomImageView::setZoomFactor(double factor) {
+    if (hasSeries()) {
+        double newScale = factor* mImageViewer->GetRenderer()->GetActiveCamera()->GetParallelScale();
+        mImageViewer->SetZoomScale(newScale);
+        mImageViewer->Render();
+    }
+}
+
 void DicomImageView::applyPanOffset(double *pan) {
     if (hasSeries()) {
         mImageViewer->applyPanOffset(pan);
diff --git a/src/src/UI/Widget/ImageView/dicomimageview.h b/src/src/UI/Widget/ImageView/dicomimageview.h
index c41fe72..6cfa152 100644
--- a/src/src/UI/Widget/ImageView/dicomimageview.h
+++ b/src/src/UI/Widget/ImageView/dicomimageview.h
@@ -113,6 +113,8 @@ public:
 
     void setZoomScale(double scale);
 
+    void setZoomFactor(double factor);
+
     void applyPanOffset(double *p);
 
     void shiftCamera(double *p);
@@ -190,7 +192,7 @@ signals:
 
     void onEndPan(DicomImageView *view, void * offsetVector);
 
-    void onEndZoom(DicomImageView *view, double newScaleFactor);
+    void onEndZoom(DicomImageView *view, double* scaleFactor);
 
     void onEndWindowLevel(DicomImageView *view, double level, double window);