diff --git a/backend/camera.py b/backend/camera.py
index b3a1f79..d8053fb 100644
--- a/backend/camera.py
+++ b/backend/camera.py
@@ -3,6 +3,8 @@ import logging
 import subprocess
 import time
 from datetime import datetime
+
+import numpy as np
 from pathlib import Path
 
 import cv2
@@ -203,7 +205,7 @@ class Camera:
             donnees = bytes(fichier.get_data_and_size())
             # Redimensionner pour alléger le WebSocket
             img = cv2.imdecode(
-                __import__("numpy").frombuffer(donnees, dtype=__import__("numpy").uint8),
+                np.frombuffer(donnees, dtype=np.uint8),
                 cv2.IMREAD_COLOR,
             )
             if img is not None:
diff --git a/backend/main.py b/backend/main.py
index e7adb39..6625734 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -89,7 +89,7 @@ async def surveiller_dslr():
     global _dslr_erreurs
     while True:
         await asyncio.sleep(5)
-        if capture_en_cours:
+        if capture_en_cours or _preview_actif:
             continue
         try:
             if GPHOTO2_DISPONIBLE: