diff --git a/main/astrodatadownloader/astrodatadownloader.py b/main/astrodatadownloader/astrodatadownloader.py
index f7936fb..6fe090b 100644
--- a/main/astrodatadownloader/astrodatadownloader.py
+++ b/main/astrodatadownloader/astrodatadownloader.py
@@ -71,6 +71,12 @@ def getStarObservations(starName: str, sources: list[ObservationSource], sequenc
 
     return obs[obsWantedFilter]
 
+def fitsFilenameFilterFunc(table, key_colnames):
+    if(str(table["productFilename"]).lower().endswith(".fits") or
+       str(table["productFilename"]).lower().endswith(".fit")):
+        return True
+    return False
+
 def downloadStarProducts(obs_wanted, keplerCadences, k2Cadences):
     if(len(keplerCadences) is not 2):
         raise Exception("keplerCadences needs to have length 2")
@@ -105,7 +111,7 @@ def downloadStarProducts(obs_wanted, keplerCadences, k2Cadences):
 
     productsWanted = table.vstack([tessProducts, keplerProducts, k2Products])
     productsWanted = productsWanted.group_by("productFilename")
+    productsWanted = productsWanted.groups.filter(fitsFilenameFilterFunc)
 
     filenames = Observations.download_products(productsWanted)
     return parse_manifest(filenames)
-