diff --git a/CpicImgSim/optics.py b/CpicImgSim/optics.py
index 233966850fd1f98590bf01dedebc0d15a1cf6dc5..288dc76cf1f8e7ecb2984a4630205d157cd1cb7f 100644
--- a/CpicImgSim/optics.py
+++ b/CpicImgSim/optics.py
@@ -16,15 +16,7 @@ FILTERS = {
     "f940": S.FileBandpass(f"{cpism_refdata}/throughtput/f940_total.fits"),
     "f1265": S.FileBandpass(f"{cpism_refdata}/throughtput/f1265_total.fits"),
     "f1425": S.FileBandpass(f"{cpism_refdata}/throughtput/f1425_total.fits"),
-    "f1542": S.FileBandpass(f"{cpism_refdata}/throughtput/f1542_total.fits"),
-    "f860": S.FileBandpass(f"{cpism_refdata}/throughtput/f860.fits"),
-    "f850": S.FileBandpass(f"{cpism_refdata}/throughtput/f850.fits"),
-    "f725": S.FileBandpass(f"{cpism_refdata}/throughtput/f725.fits"),
-    "f720": S.FileBandpass(f"{cpism_refdata}/throughtput/f725.fits"),
-    "f520": S.FileBandpass(f"{cpism_refdata}/throughtput/f520.fits"),
-    "f662": S.FileBandpass(f"{cpism_refdata}/throughtput/f662.fits"),
-    "f729": S.FileBandpass(f"{cpism_refdata}/throughtput/f729.fits"),
-    "f825": S.FileBandpass(f"{cpism_refdata}/throughtput/f825.fits"),
+    "f1542": S.FileBandpass(f"{cpism_refdata}/throughtput/f1542_total.fits")
 }