diff --git a/backend/main.py b/backend/main.py
index 741584f..b8807db 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -36,17 +36,34 @@ clients_ws: list[WebSocket] = []
 
 
 capture_en_cours = False
+_dslr_erreurs = 0
 
 async def surveiller_dslr():
     """Verifie periodiquement si un DSLR est branche et bascule dessus."""
+    global _dslr_erreurs
     while True:
-        await asyncio.sleep(10)
+        await asyncio.sleep(5)
         if capture_en_cours:
             continue
         try:
-            if camera.mode != "gphoto2" and GPHOTO2_DISPONIBLE:
+            if GPHOTO2_DISPONIBLE:
                 dslrs = gp.Camera.autodetect()
-                if len(dslrs) > 0:
+                if camera.mode == "gphoto2":
+                    # Verifier que le DSLR repond encore
+                    try:
+                        camera.camera.get_summary()
+                        _dslr_erreurs = 0
+                    except Exception:
+                        _dslr_erreurs += 1
+                        if _dslr_erreurs >= 2:
+                            log.warning("DSLR ne repond plus, reconnexion...")
+                            _dslr_erreurs = 0
+                            camera.deconnecter()
+                            if len(dslrs) > 0:
+                                camera.connecter(source="gphoto2")
+                            else:
+                                camera.connecter()  # fallback webcam
+                elif len(dslrs) > 0:
                     log.info(f"DSLR detecte : {dslrs[0][0]}, bascule automatique")
                     camera.connecter(source="gphoto2")
         except Exception: