From ab0bece70bcc682fd2c3716d1230935cd79e4d3c Mon Sep 17 00:00:00 2001
From: Julian Stirling <julian@julianstirling.co.uk>
Date: Wed, 20 Aug 2025 13:14:16 +0100
Subject: [PATCH] Deepcopy default tuning file so it isn't affected by
 calibration.

---
 src/openflexure_microscope_server/things/camera/picamera.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/openflexure_microscope_server/things/camera/picamera.py b/src/openflexure_microscope_server/things/camera/picamera.py
index 130537de..b12b888a 100644
--- a/src/openflexure_microscope_server/things/camera/picamera.py
+++ b/src/openflexure_microscope_server/things/camera/picamera.py
@@ -20,6 +20,7 @@ from datetime import datetime
 import json
 import logging
 import os
+import copy
 import tempfile
 import time
 from contextlib import contextmanager
@@ -138,7 +139,7 @@ class StreamingPiCamera2(BaseCamera):
         # Set tuning to default tuning. This will be overwritten when the Thing is
         # connects to the server if tuning is saved to disk.
         try:
-            self.tuning = self.default_tuning
+            self.tuning = copy.deepcopy(self.default_tuning)
         except NotConnectedToServerError:
             # This will throw an error after setting as we are not connected to
             # a server. But we know this, so we ignore the error.