diff --git a/xray/azav.py b/xray/azav.py
index 5ca360e..fa4daaa 100644
--- a/xray/azav.py
+++ b/xray/azav.py
@@ -219,7 +219,7 @@ def removeBackground(data,qlims=(0,10),max_iter=30,background_regions=[],force=F
 
 
 def doFolder(folder,files='*.edf*',nQ = 1500,force=False,mask=None,dark=10,norm='auto',
-             saveChi=True,poni='pyfai.poni',storageFile='auto',save=True,diagnostic=None):
+             saveChi=True,poni='pyfai.poni',storageFile='auto',save=True,diagnostic=None,skip_first=0,last=None):
   """ calc 1D curves from files in folder, returning a dictionary of stuff
       nQ    : number of Q-points (equispaced)
       force : if True, redo from beginning even if previous data are found
@@ -247,7 +247,7 @@ def doFolder(folder,files='*.edf*',nQ = 1500,force=False,mask=None,dark=10,norm=
   else:
     saved = None
 
-  files = utils.getFiles(folder,files)
+  files = utils.getFiles(folder,files)[skip_first:last]
   if saved is not None:
     files = [f for f in files if utils.getBasename(f) not in saved["files"]]