diff --git a/csaxs_bec/device_configs/ptycho_flomni.yaml b/csaxs_bec/device_configs/ptycho_flomni.yaml
index b8a3f26..69fe470 100644
--- a/csaxs_bec/device_configs/ptycho_flomni.yaml
+++ b/csaxs_bec/device_configs/ptycho_flomni.yaml
@@ -91,6 +91,9 @@ foptx:
     #250 micron, 30 nm, Tomas structures
     # in: -14.5490625
     # out: -14.1809
+    fzp_diameter: 170              # microns
+    fzp_outermost_zone_width: 60   # nm
+    detector_distance: -1          # mm, sample-to-detector; unknown for now
   deviceTags:
     - ptycho_flomni
 
diff --git a/csaxs_bec/device_configs/ptycho_lamni.yaml b/csaxs_bec/device_configs/ptycho_lamni.yaml
index e4e43a3..2ca412d 100644
--- a/csaxs_bec/device_configs/ptycho_lamni.yaml
+++ b/csaxs_bec/device_configs/ptycho_lamni.yaml
@@ -62,6 +62,10 @@ loptx:
   userParameter:
     in: -0.244
     out: -0.699
+    # 170 micron, 60 nm
+    fzp_diameter: 170              # microns
+    fzp_outermost_zone_width: 60   # nm
+    detector_distance: -1          # mm, sample-to-detector; unknown for now
   deviceTags:
     - ptycho_lamni
 lopty: