Actually For 100mm equivalent Olympus does have a fast lens in the 50/2 macro and for longer there are the very good Sigma macros at 105/2.8 and 150/2.8. But yeah for fast zooms of varying focal lengths Olympus does come up short unless you are willing to pony up 5k for the 90-250, 300/2.8 or 2k for the 150/2