Update slides/ws-video/slides.md

slides/ws-video/slides.md

@@ -50,7 +50,12 @@ _Maximum sensor frame rate dependent on resolution and codec selected. Project f
 
 f-Stop on Photography lenses
 
-<img data-src="https://git.noc.ruhr-uni-bochum.de/makerspace/homepage/-/raw/main/slides/ws-video/Apertures.png" width="50%"/>
+<img data-src="https://upload.wikimedia.org/wikipedia/commons/thumb/f/f8/Lenses_with_different_apertures.jpg/2560px-Lenses_with_different_apertures.jpg" width="50%"/>
+
+CC BY-SA 4.0 <br>
+lenses with different aperture <br>
+By: KoeppiK <br>
+https://en.wikipedia.org/wiki/Aperture#/media/File:Lenses_with_different_apertures.jpg
 
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