What are my options for a light weight wildlife lens for a MFT camera (Probably going to be an Olympus E-P3). I am buying a MFT setup to take hiking (Going to be walking the 2650 miles of the Pacific Crest Trail next year) as my usual Nikon DSLR setup is far too heavy. The lenses I am after are a landscape lens (Probably the 12mm f2) and a wildlife lens. On my DSLR setup I use a 300mm f4, sometimes with a 1.4X TC. The DSLR is a 1.5X crop, so I am ideally looking at something in the 450mm-630mm equivalent. It needs to be as light as possible and as sharp as possible. I know Panasonic do the 100mm-300mm and Olympus the 75-300mm. Are there any other options out there? Which is the choice of these two? Shame there isn't something like a 250mm f4 prime out there for MFT.