Love this lens.. built like a tank, and weighs pounds! Took four generic photos today, just to show the effect of the built in filters on this lens. All taken with a Olympus E-M5 with Fotodiox MD/MC -m4/3 adapter. Handheld, about f4.0, iso 320, 1/320 second, not really sure what I focused on, so excuse the lack of crispness These are straight out of the camera as shot RAW 1A Filter 80B Filter Y48 Filter 056 Filter Heres one I did edit a slight bit. f4.0, iso 320, 1/320 second, I think I was about 50' away from this building wall.