6. Rotate the lens 30° clockwise (looking at the front of the lens).
13.8 Removing an additional infrared lens
NOTE
Do not touch the lens surface when you mount an infrared lens. If this happens, clean the lens accord-
ing to the instructions in 28.2 Infrared lens, page 121.
When you have removed the lens, put the lens caps on the lens immediately, to protect it from dust and
fingerprints.