diff --git a/nd2reader/__init__.py b/nd2reader/__init__.py
index 27b0b6e..d53beeb 100644
--- a/nd2reader/__init__.py
+++ b/nd2reader/__init__.py
@@ -24,7 +24,7 @@ class Nd2(BaseNd2):
         """
         for i in range(self._image_count):
             for fov in range(self.field_of_view_count):
-                for z_level in range(self._z_level_count):
+                for z_level in range(self.z_level_count):
                     for channel in self.channels:
                         image = self.get_image(i, fov, channel.name, z_level)
                         if image.is_valid:
@@ -34,9 +34,9 @@ class Nd2(BaseNd2):
         """
         Gets all the images for a given field of view and
         """
-        timepoint_set = xrange(self._timepoint_count) if timepoints is None else timepoints
+        timepoint_set = xrange(self.timepoint_count) if timepoints is None else timepoints
         channel_set = [channel.name for channel in self.channels] if channels is None else channels
-        z_level_set = xrange(self._z_level_count) if z_levels is None else z_levels
+        z_level_set = xrange(self.z_level_count) if z_levels is None else z_levels
 
         for timepoint in timepoint_set:
             image_set = ImageSet()
diff --git a/nd2reader/service/__init__.py b/nd2reader/service/__init__.py
index 5393db9..b07fbc3 100644
--- a/nd2reader/service/__init__.py
+++ b/nd2reader/service/__init__.py
@@ -53,11 +53,11 @@ class BaseNd2(object):
         return self._metadata['ImageEvents']['RLxExperimentRecord']['uiCount']
 
     @property
-    def _timepoint_count(self):
-        return self._image_count / self.field_of_view_count / self._z_level_count
+    def timepoint_count(self):
+        return self._image_count / self.field_of_view_count / self.z_level_count
 
     @property
-    def _z_level_count(self):
+    def z_level_count(self):
         return self._image_count / self._sequence_count
 
     @property
@@ -72,7 +72,7 @@ class BaseNd2(object):
         return sum(self._metadata['ImageMetadata']['SLxExperiment']['ppNextLevelEx']['']['pItemValid'])
 
     @property
-    def _channel_count(self):
+    def channel_count(self):
         return self._reader.channel_count
 
     @property
@@ -88,7 +88,7 @@ class BaseNd2(object):
         return self._reader.metadata
 
     def _calculate_image_set_number(self, timepoint, fov, z_level):
-        return timepoint * self.field_of_view_count * self._z_level_count + (fov * self._z_level_count + z_level)
+        return timepoint * self.field_of_view_count * self.z_level_count + (fov * self.z_level_count + z_level)
 
 
 class Nd2Reader(object):