I just received a 300mm lens today and I have been playing with it in the house since it was dark when I got home. Anyway, I cannot see any focus peaking information with this lens. Here is my setup. E-P5 Focus peaking activated by red record button. New lens - Canon 300mm F4 -L on the same canon to m4/3 adapter I have been using for 2 years. When I put the lens on and turn on focus peaking, I can see clearly that I can go forward and past the focus range but no peaking shows up. I swap lenses to my OM 50mm f1.4 lens, do the same test and the focus peaking is very good. No changes to camera. Turn off, swap lenses, try again at 300mm, no peaking. I can see the image change when I turn on focus peaking but there are no white highlights. Whats up??? Does focus peaking struggle with long lenses? Will it work better with more light and longer distances outside? (I will test this tomorrow) Anyone have experience with focus peaking on 300mm + lenses? Focus peaking seems to work fine with my Canon 200mm lens.