diff --git a/viewer_examples/viewers/collection_viewer.py b/viewer_examples/viewers/collection_viewer.py
index b36ddf82..32c0b836 100644
--- a/viewer_examples/viewers/collection_viewer.py
+++ b/viewer_examples/viewers/collection_viewer.py
@@ -21,9 +21,11 @@ home/end keys
 import numpy as np
 from skimage import data
 from skimage.viewer import CollectionViewer
+from skimage.transform import build_gaussian_pyramid
+
 
 img = data.lena()
-img_collection = [np.uint8(img * 0.9**i) for i in range(20)]
+img_collection = tuple(build_gaussian_pyramid(img))
 
 view = CollectionViewer(img_collection)
 view.show()