Sorry for my bad english. For my vacation I was looking for a wide angle lens, requirements were that this had to be compact and lightweight, low distortion at 9mm, using filters is possible and all round had to be deployed, so i bought the Olympus 9- 8mm. I am of the Olympus 9-18mm (9mm) so extremely happy that this during city trips, 60% of the time is to stay on my body. When you read down here to holiday use viewing the current range of lenses, then I think there is surely about it to make the Pro 12-40 2.8 of the hand. Especially since the Olympus 9-18mm performs so well and is nice and compact / light relative to the Pro 12-40. The least used lenses (vacation): 25mm 1.8: Only used one time and quickly grabbed the Olympus 9-18mm. 12-40 Pro 2.8: Not used! The most commonly used lenses (vacation): Olympus 9-18mm: on vacation 60% of the time left on my body. 45mm 1.8: Number of times used in portrait and in some situations where I wished limited depth (remains beautiful lens). Pro 2.8 40-150 + Olympus MC-14: uses 30% of the time. The Olympus 12-40 Pro 2.8 is still a beautiful lens and my choice to do not want to quickly make this lens of the hand, I wonder if there are more people who have been the same choice and if I something over the head, see?