diff --git a/focus_seq_FLI.py b/focus_seq_FLI.py
index 9686366..581c508 100755
--- a/focus_seq_FLI.py
+++ b/focus_seq_FLI.py
@@ -20,9 +20,22 @@ import subprocess as sp
 import numpy as np
 import pathlib as pl
 
-
 # --- FLI-hardware related (ROBOTEL variant)
 
+# common "ccd_capture" executable commandline options
+ccd_capture_cmd_common = [
+    "ccd_capture",
+    "-VVV",
+    "--plugin",
+    "libdevfli.so",
+    "-r",
+    "/tmp/10micron.fitsheader",
+    "-r",
+    "/tmp/telescope.fitsheader",
+    "-r",
+    "/tmp/dome.fitsheader",
+]
+
 
 def init_seq(seq_kwds):
     # # replace extension since Eddy's 'fli_control' adds hardcoded '.fit'
@@ -40,8 +53,10 @@ def init_seq(seq_kwds):
     #
 
     foc_files = list(
-    # 27.04.2026
-        pt.absolute().parent.glob("{}_[0-9][0-9][0-9][0-9]{}".format(pt.stem, pt.suffix))
+        # 27.04.2026
+        pt.absolute().parent.glob(
+            "{}_[0-9][0-9][0-9][0-9]{}".format(pt.stem, pt.suffix)
+        )
         # pt.absolute().parent.glob("{}_[0-9][0-9][0-9][0-9].fit".format(pt.stem))
     )
 
@@ -67,8 +82,9 @@ def set_focus(foc_val):
     # cmd = ["fli_control", "-g", str(int(foc_val))]
 
     # 27.04.2026
-    cmd = ["ccd_capture", "-VVV", "--plugin", "libdevfli.so", "-r", "/tmp/10micron.fitsheader", "-r", "/tmp/telescope.fitsheader", "-r", "/tmp/dome.fitsheader", "-g", str(foc_val)]
-    
+    # cmd = ["ccd_capture", "-VVV", "--plugin", "libdevfli.so", "-r", "/tmp/10micron.fitsheader", "-r", "/tmp/telescope.fitsheader", "-r", "/tmp/dome.fitsheader", "-g", str(foc_val)]
+    cmd = ccd_capture_cmd_common + ["-g", str(foc_val)]
+
     ret = sp.run(cmd, stdout=sp.PIPE, stderr=sp.PIPE)
     return ret.returncode
 
@@ -78,7 +94,6 @@ def get_image(filename, exp_time):
     # Eddy's 'fli_control' related stub:
     #     filename is expected in form 'rootname_DDDD.ext'
     #     convert it to 'rootname'
-    
 
     # fname = str(filename).split("_")
     # fname = fname[0]
@@ -93,8 +108,9 @@ def get_image(filename, exp_time):
     # ]
 
     # 27.04.2026
-    cmd = ["ccd_capture", "-VVV", "--plugin", "libdevfli.so", "-r", "/tmp/10micron.fitsheader", "-r", "/tmp/telescope.fitsheader", "-r", "/tmp/dome.fitsheader", "-x", str(exp_time), "-o", filename]
-    
+    # cmd = ["ccd_capture", "-VVV", "--plugin", "libdevfli.so", "-r", "/tmp/10micron.fitsheader", "-r", "/tmp/telescope.fitsheader", "-r", "/tmp/dome.fitsheader", "-x", str(exp_time), "-o", filename]
+    cmd = ccd_capture_cmd_common + ["-x", str(exp_time), "-o", filename]
+
     ret = sp.run(cmd, stdout=sp.PIPE, stderr=sp.PIPE)
     return ret.returncode
 
@@ -102,7 +118,7 @@ def get_image(filename, exp_time):
 if __name__ == "__main__":
     parser = ap.ArgumentParser(
         prog="{}".format(pl.Path(sys.argv[0]).name),
-    # 27.04.2026
+        # 27.04.2026
         description="FLI CCD and focuser hardware: focussing sequence implementation. It is assumed that 'ccd_capture' software is installed in the OS.",
         # description="FLI CCD and focuser hardware: focussing sequence implementation. It is assumed that 'fli_control' software is installed in the OS.",
     )