diff --git a/csaxs_bec/device_configs/frontend.yaml b/csaxs_bec/device_configs/frontend.yaml
index 1dfbb07..966248b 100644
--- a/csaxs_bec/device_configs/frontend.yaml
+++ b/csaxs_bec/device_configs/frontend.yaml
@@ -41,7 +41,7 @@ sl1xr:
   description: 'slit 1 (frontend) x ring'
   deviceClass: ophyd.EpicsMotor
   deviceConfig: 
-    prefix: 'X12SA-FE-SLDI1:TRXR'
+    prefix: 'X12SA-FE-SL1:TRXR'
   onFailure: raise
   enabled: true
   readoutPriority: baseline
@@ -55,7 +55,7 @@ sl1xw:
   description: 'slit 1 (frontend) x wall'
   deviceClass: ophyd.EpicsMotor
   deviceConfig: 
-    prefix: 'X12SA-FE-SLDI1:TRXW'
+    prefix: 'X12SA-FE-SL1:TRXW'
   onFailure: raise
   enabled: true
   readoutPriority: baseline
@@ -69,7 +69,7 @@ sl1yb:
   description: 'slit 1 (frontend) y bottom'
   deviceClass: ophyd.EpicsMotor
   deviceConfig: 
-    prefix: 'X12SA-FE-SLDI1:TRYB'
+    prefix: 'X12SA-FE-SL1:TRYB'
   onFailure: raise
   enabled: true
   readoutPriority: baseline
@@ -83,7 +83,7 @@ sl1yt:
   description: 'slit 1 (frontend) y top'
   deviceClass: ophyd.EpicsMotor
   deviceConfig: 
-    prefix: 'X12SA-FE-SLDI1:TRYT'
+    prefix: 'X12SA-FE-SL1:TRYT'
   onFailure: raise
   enabled: true
   readoutPriority: baseline
diff --git a/csaxs_bec/devices/ids_cameras/ids_camera_new.py b/csaxs_bec/devices/ids_cameras/ids_camera_new.py
index 17abdab..ecb3f83 100644
--- a/csaxs_bec/devices/ids_cameras/ids_camera_new.py
+++ b/csaxs_bec/devices/ids_cameras/ids_camera_new.py
@@ -40,7 +40,7 @@ class IDSCamera(PSIDeviceBase):
         async_update={"type": "add", "max_shape": [None]},
     )
 
-    USER_ACCESS = ["live_mode", "roi", "set_rect_roi", "get_last_image"]
+    USER_ACCESS = ["live_mode", "mask", "set_rect_roi", "get_last_image"]
 
     def __init__(
         self,
@@ -124,7 +124,7 @@ class IDSCamera(PSIDeviceBase):
         if x < 0 or y < 0 or width <= 0 or height <= 0:
             raise ValueError("ROI coordinates and dimensions must be positive integers.")
         img_shape = (self.cam.cam.height.value, self.cam.cam.width.value)
-        if x + width > img_shape[0] or y + height > img_shape[1]:
+        if x + width > img_shape[1] or y + height > img_shape[0]:
             raise ValueError("ROI exceeds camera dimensions.")
         mask = np.zeros(img_shape, dtype=np.uint8)
         mask[y : y + height, x : x + width] = 1