diff --git a/src/ctapipe/instrument/camera/description.py b/src/ctapipe/instrument/camera/description.py
index b88bc1fa48d..6c4f2c466db 100644
--- a/src/ctapipe/instrument/camera/description.py
+++ b/src/ctapipe/instrument/camera/description.py
@@ -60,14 +60,26 @@ def get_known_camera_names(cls):
 
     @classmethod
     def from_name(cls, name):
-        """
-        Construct a CameraDescription from a camera name
+        """Construct a CameraDescription from a camera name
 
         Parameters
         ----------
         name: str
             Camera name (e.g. NectarCam, LSTCam, ...)
 
+
+        Notes
+        -----
+
+        Warning: This method loads a pre-generated ``CameraDescription`` and is
+        thus not guranteed to be the same pixel ordering or even positions that
+        correspond with event data! Therefore if you are analysing data, you
+        should not rely on this method, but rather open the data with an
+        ``EventSource`` and use the ``CameraDescription`` that is provided by
+        ``source.subarray.tel[i].camera`` or by
+        ``source.subarray.camera_types[type_name]``. This will guarantee that
+        the pixels in the event data correspond with the ``CameraDescription``
+
         Returns
         -------
         CameraDescription
diff --git a/src/ctapipe/instrument/telescope.py b/src/ctapipe/instrument/telescope.py
index edab4e24490..f7cd58120b0 100644
--- a/src/ctapipe/instrument/telescope.py
+++ b/src/ctapipe/instrument/telescope.py
@@ -84,6 +84,19 @@ def from_name(cls, optics_name, camera_name):
            optics name (e.g. LST, or SST-ASTRI), also called
            telescope_description
 
+        Notes
+        -----
+
+        Warning: This method loads a pre-generated ``TelescopeDescription`` and is
+        thus not guranteed to be the same pixel ordering or even positions that
+        correspond with event data! Therefore if you are analysing data, you
+        should not rely on this method, but rather open the data with an
+        ``EventSource`` and use the ``TelescopeDescription`` that is provided by
+        ``source.subarray.tel[i]`` or by
+        ``source.subarray.telescope_types[type_name]``. This will guarantee that
+        the pixels in the event data correspond with the ``TelescopeDescription``
+
+
         Returns
         -------
         TelescopeDescription