diff --git a/libeos/command_line.py b/libeos/command_line.py
index 66375ac..3bcda6f 100644
--- a/libeos/command_line.py
+++ b/libeos/command_line.py
@@ -181,6 +181,7 @@ def command_line_options():
         )
     reduction_config = ReductionConfig(
         qResolution                  = clas.qResolution,
+        qzRange                      = clas.qzRange,
         autoscale                    = clas.autoscale,
         thetaRange                   = clas.thetaRange,
         thetaRangeR                  = clas.thetaRangeR,
diff --git a/libeos/instrument.py b/libeos/instrument.py
index 9a48817..3760eb4 100644
--- a/libeos/instrument.py
+++ b/libeos/instrument.py
@@ -20,10 +20,11 @@ class Detector:
 
 class Grid:
 
-    def __init__(self, qResolution):
+    def __init__(self, qResolution, qzRange):
         self.lamdaCut = const.lamdaCut
         self.dldl = 0.005     # Delta lambda / lambda
         self.qResolution = qResolution
+        self.qzRange = qzRange
 
     def q(self):
         resolutions = [0.005, 0.01, 0.02, 0.025, 0.04, 0.05, 0.1, 1]
@@ -35,7 +36,8 @@ class Grid:
         # linear up to qq
         q_grid = np.arange(0, qq, qq*dqdq)
         # exponential from qq on
-        q_grid = np.append(q_grid, qq*(1.+dqdq)**np.arange(int(np.log(0.3/qq)/np.log(1+dqdq))))
+        q_grid = np.append(q_grid, qq*(1.+dqdq)**np.arange(int(np.log(self.qzRange[1]/qq)/np.log(1+dqdq))))
+        q_grid = q_grid[q_grid>=self.qzRange[0]]
         return q_grid
 
     def lamda(self):
diff --git a/libeos/options.py b/libeos/options.py
index 13dedee..6f2a16c 100644
--- a/libeos/options.py
+++ b/libeos/options.py
@@ -58,6 +58,7 @@ class ExperimentConfig:
 @dataclass
 class ReductionConfig:
     qResolution: float
+    qzRange: Tuple[float, float]
     thetaRange: Tuple[float, float]
     thetaRangeR: Tuple[float, float]
 
@@ -178,4 +179,4 @@ class EOSConfig:
 
         return  mlst
 
-            
\ No newline at end of file
+            
diff --git a/libeos/reduction.py b/libeos/reduction.py
index 2ab8e9b..a6f3642 100644
--- a/libeos/reduction.py
+++ b/libeos/reduction.py
@@ -17,7 +17,7 @@ class AmorReduction:
         self.reader_config = config.reader
         self.reduction_config = config.reduction
         self.output_config = config.output
-        self.grid = Grid(config.reduction.qResolution)
+        self.grid = Grid(config.reduction.qResolution, config.experiment.qzRange)
         self.header = Header()
 
         self.header.reduction.call = EOSConfig.call_string(self)
@@ -87,15 +87,16 @@ class AmorReduction:
             headerRqz = self.header.orso_header()
             headerRqz.data_set = f'Nr {i} : mu = {self.file_reader.mu:6.3f} deg'
 
-            # projection on q-grid
+            # projection on qz-grid
             q_q, R_q, dR_q, dq_q = self.project_on_qz(qz_lz, ref_lz, err_lz, res_lz, self.norm_lz, self.mask_lz)
 
-            filter_q = np.where((self.experiment_config.qzRange[0]>q_q) & (q_q>self.experiment_config.qzRange[1]),
-                                False, True)
-            q_q = q_q[filter_q]
-            R_q = R_q[filter_q]
-            dR_q = dR_q[filter_q]
-            dq_q = dq_q[filter_q]
+            # The filtering is now done by restricting the qz-grid
+            #filter_q = np.where((self.experiment_config.qzRange[0]>q_q) & (q_q>self.experiment_config.qzRange[1]),
+            #                    False, True)
+            #q_q = q_q[filter_q]
+            #R_q = R_q[filter_q]
+            #dR_q = dR_q[filter_q]
+            #dq_q = dq_q[filter_q]
 
             if self.reduction_config.autoscale:
                 if i==0: