diff --git a/debye_bec/devices/cameras/basler_cam.py b/debye_bec/devices/cameras/basler_cam.py
index e38076a..fbf0477 100644
--- a/debye_bec/devices/cameras/basler_cam.py
+++ b/debye_bec/devices/cameras/basler_cam.py
@@ -31,6 +31,6 @@ class BaslerCam(DebyeBaseCamera, BaslerCamBase):
         PreviewSignal,
         name="preview",
         ndim=2,
-        num_rotation_90=-1,
+        num_rotation_90=3,
         doc="Preview signal for the camera.",
     )
diff --git a/debye_bec/devices/cameras/prosilica_cam.py b/debye_bec/devices/cameras/prosilica_cam.py
index cbbc259..69846dd 100644
--- a/debye_bec/devices/cameras/prosilica_cam.py
+++ b/debye_bec/devices/cameras/prosilica_cam.py
@@ -34,6 +34,6 @@ class ProsilicaCam(DebyeBaseCamera, ProsilicaCamBase):
         PreviewSignal,
         name="preview",
         ndim=2,
-        num_rotation_90=-1,
+        num_rotation_90=3,
         doc="Preview signal for the camera.",
     )
diff --git a/tests/tests_devices/test_cameras.py b/tests/tests_devices/test_cameras.py
index fba8ac3..7fcb078 100644
--- a/tests/tests_devices/test_cameras.py
+++ b/tests/tests_devices/test_cameras.py
@@ -40,7 +40,7 @@ def test_basler_init(mock_basler):
     assert mock_basler._live_mode_event is None
     assert mock_basler._task_status is None
     assert mock_basler.preview.ndim == 2
-    assert mock_basler.preview.num_rotation_90 == -1
+    assert mock_basler.preview.num_rotation_90 == 3
 
 
 @pytest.fixture(scope="function")
@@ -67,4 +67,4 @@ def test_prosilica_init(mock_prosilica):
     assert mock_prosilica._live_mode_event is None
     assert mock_prosilica._task_status is None
     assert mock_prosilica.preview.ndim == 2
-    assert mock_prosilica.preview.num_rotation_90 == -1
+    assert mock_prosilica.preview.num_rotation_90 == 3