diff --git a/slides/ws-video/slides.md b/slides/ws-video/slides.md
index 339cddf2ca5f4ae51f0b6b6de110a9d31942b967..c7dffa3082dda472366fce47a06a21f13c003103 100644
--- a/slides/ws-video/slides.md
+++ b/slides/ws-video/slides.md
@@ -147,6 +147,8 @@ Common values for focal length: 18mm, 24mm, 35mm
 
 a focal lenght of 50mm is concidered a standard lense equal to the human eye.
 
+<img data-src="https://upload.wikimedia.org/wikipedia/commons/9/9c/Angleofview_50mm_f4.jpg" width="100%"/>
+
 |||
 
 ### Tight Lenses - more magnified
@@ -155,6 +157,8 @@ Common values for focal length: 85mm, 100mm, 135mm
 
 long focal length compresses the background and helps isolating a subject.
 
+<img data-src="https://upload.wikimedia.org/wikipedia/commons/f/fd/Angleofview_210mm_f4.jpg" width="100%"/>
+
 |||
 
 ### Aperture / Iris