diff --git a/autogalaxy/operate/deflections.py b/autogalaxy/operate/deflections.py
index 28f01958..eeacb93c 100644
--- a/autogalaxy/operate/deflections.py
+++ b/autogalaxy/operate/deflections.py
@@ -104,6 +104,13 @@ class OperateDeflections:
         The function which returns the mass object's 2D deflection angles.
     """
 
+    @property
+    def plane_redshifts(self) -> List[float]:
+        return []
+
+    def deflections_between_planes_from(self, grid, plane_i: int, plane_j: int):
+        return self.deflections_yx_2d_from(grid=grid)
+
     def deflections_yx_2d_from(self, grid: aa.type.Grid2DLike, **kwargs):
         raise NotImplementedError