Olympus patents a crazy cool 300-500mm f/2.8-4.0 MFT lens! - 43 Rumors It looks Olympus has been listening to those of you who have been complaining about the heavy constant ƒ2.8 zooms and want something closer to ƒ4.0. They also have been listening to those of use who want more reach at fast apertures for sports and wildlife. SO, WHAT DID THEY COME UP WITH TO PLEASE BOTH GROUPS? DRUM ROLL PLEASE.......... 1 - 300-500mm ƒ2.8-4.0 2 - 200-300mm ƒ2.8-4.0 That 300-500 would be a dream lens for me. That would honestly get me to stop lusting over a Metabones and the Canon 200-400 ƒ4.0 (the one with the internal 1.4x extender). Yes, it would be heavy........but damn...........that would make such an amazing wildlife lens for those times I really needed 1000mm of reach (1400mm with the MC-14). It would not be a walk around all day lens like I use my 150/2, but in the kayak or a hide it would be so wonderful. I know patents don't always come to fruition, but one can hope and dream that it one day could be in their hands.