diff --git a/src/openflexure_microscope_server/things/camera/simulation.py b/src/openflexure_microscope_server/things/camera/simulation.py
index a374f764..4735eede 100644
--- a/src/openflexure_microscope_server/things/camera/simulation.py
+++ b/src/openflexure_microscope_server/things/camera/simulation.py
@@ -36,7 +36,7 @@ LOGGER = logging.getLogger(__name__)
 
 # The ratio between "motor" steps and pixels in (x, y, z)
 # higher related to a faster movement
-RATIO = (2, 2, 0.2)
+RATIO = (2, 2, 0.07)
 
 # Some colour variation, for bg detect.
 BG_COLOR = [220, 215, 217]