diff --git a/src/aare/beamline_dispatch/x10sa/beamline_dispatch.py b/src/aare/beamline_dispatch/x10sa/beamline_dispatch.py
index f1025b87..eea976ab 100644
--- a/src/aare/beamline_dispatch/x10sa/beamline_dispatch.py
+++ b/src/aare/beamline_dispatch/x10sa/beamline_dispatch.py
@@ -129,4 +129,4 @@ class X10saDispatch(DefaultDispatch):
     @property
     def default_auto_raster_parameters(self) -> dict[str, Any]:
         # Full transmission for 20 keV rastering
-        return {"exp_time_s": 0.02, "transmission": 1.0, "dtz": 200}
+        return {"exp_time_s": 0.02, "transmission": 0.1, "dtz": 200}