diff --git a/script/RefocusManipulatorScan.py b/script/RefocusManipulatorScan.py
index 50f5befa..40476b97 100644
--- a/script/RefocusManipulatorScan.py
+++ b/script/RefocusManipulatorScan.py
@@ -10,7 +10,7 @@ move manipulator and mirror to center position before start!
 import math
 
 # adjust the following parameters
-DISTANCE_Ry = 0.8 # mrad (Ry)
+DISTANCE_Ry = 0.2 # mrad (Ry)
 SLOPE = -2.000 # mm/mrad (DX / DRy)
 STEPS = 40
 LATENCY = 0.5