Schritt 5 übersetzen
Remove 4 - 4mm screws. Once removed the barrel will release and extend.
Make a marking (i used white) to align with the White marking on the Focus ring to make re-assembly easier
Notice the 3 Grooves. These are the slide grooves where the barrel moves up and down. You will need to release the pins from the grooves at each point - one by one by using pressure.