diff --git a/src/calibre/gui2/convert/metadata.py b/src/calibre/gui2/convert/metadata.py
index b5a866135e..d87310631c 100644
--- a/src/calibre/gui2/convert/metadata.py
+++ b/src/calibre/gui2/convert/metadata.py
@@ -97,11 +97,14 @@ class MetadataWidget(Widget, Ui_Form):
             pm = QPixmap()
             pm.loadFromData(cover)
             if not pm.isNull():
+                pm.setDevicePixelRatio(getattr(self, 'devicePixelRatioF', self.devicePixelRatio)())
                 self.cover.setPixmap(pm)
                 self.cover_data = cover
                 self.set_cover_tooltip(pm)
         else:
-            self.cover.setPixmap(QPixmap(I('default_cover.png')))
+            pm = QPixmap(I('default_cover.png'))
+            pm.setDevicePixelRatio(getattr(self, 'devicePixelRatioF', self.devicePixelRatio)())
+            self.cover.setPixmap(pm)
             self.cover.setToolTip(_('This book has no cover'))
         for x in ('author', 'series', 'publisher'):
             x = getattr(self, x)
@@ -201,6 +204,7 @@ class MetadataWidget(Widget, Ui_Form):
             if cover:
                 pix = QPixmap()
                 pix.loadFromData(cover)
+                pix.setDevicePixelRatio(getattr(self, 'devicePixelRatioF', self.devicePixelRatio)())
                 if pix.isNull():
                     d = error_dialog(self.parent(), _('Error reading file'),
                                       _file + _(" is not a valid picture"))
diff --git a/src/calibre/gui2/metadata/basic_widgets.py b/src/calibre/gui2/metadata/basic_widgets.py
index 5d8331cfcf..08f0149e78 100644
--- a/src/calibre/gui2/metadata/basic_widgets.py
+++ b/src/calibre/gui2/metadata/basic_widgets.py
@@ -1172,6 +1172,7 @@ class Cover(ImageView):  # {{{
                 pm = QPixmap(I('default_cover.png'))
             else:
                 self._cdata = cdata
+            pm.setDevicePixelRatio(getattr(self, 'devicePixelRatioF', self.devicePixelRatio)())
             self.setPixmap(pm)
             tt = _('This book has no cover')
             if self._cdata:
diff --git a/src/calibre/gui2/widgets.py b/src/calibre/gui2/widgets.py
index 962f2fcb73..6bc08aea3a 100644
--- a/src/calibre/gui2/widgets.py
+++ b/src/calibre/gui2/widgets.py
@@ -343,9 +343,9 @@ class ImageView(QWidget, ImageDropMixin):  # {{{
         cw, ch = self.rect().width(), self.rect().height()
         scaled, nw, nh = fit_image(w, h, cw, ch)
         if scaled:
-            pmap = pmap.scaled(nw, nh, Qt.IgnoreAspectRatio,
+            pmap = pmap.scaled(nw*pmap.devicePixelRatio(), nh*pmap.devicePixelRatio(), Qt.IgnoreAspectRatio,
                     Qt.SmoothTransformation)
-        w, h = pmap.width(), pmap.height()
+        w, h = pmap.width()/pmap.devicePixelRatio(), pmap.height()/pmap.devicePixelRatio()
         x = int(abs(cw - w)/2.)
         y = int(abs(ch - h)/2.)
         target = QRect(x, y, w, h)