I had a lifestyle family shoot on Monday and wanted to get much more familiar with my new Olympus long reach lens so a few days before, I make to it with me to a local beach where my wife and I walk the boardwalk - - - I require this lens for the portraits to extend the reach of my standard 12-60mm lens for compressed perspective and shallow DOF shots.
I have to admit that after playing with the 140-600 (that is what Olympus has labeled it) when I purchased it, I found it to be a bit a of a challenge getting shots that were sharp enough - mostly all a result of motion. I think that it is a case of a lens that has a focal length to die for - that is simply too long for using with a hand held freewheeling shooting style. At least without a lot of practice and some discretion in the focal length used, shutter speed, and maybe even subject matter. That said, any long 300mm to 600mm lens would be a challenge in this regard.
A trip to our nearby beach produced some hits and some misses for me to evaluate. I used the 70-300mm lens on my E-510 where my standard settings are "Natural > Contrast -1 > Sharpen -2 > Saturation 0" : Noise FIlter - Low : IS set to on : WB set to Auto or Shade on some for a warm glow that I wanted.
1) 300mm (600mm) setting : 400 ISO : f8 @ 1/400'th
2) 158mm (316mm) setting : 400 ISO : f4.6 @ 1/500'th
3) Anne took this shot of me sitting on a bench for a skin tone reference and background blurring at shorter focal lengths
78mm (156mm) setting : 400 ISO : f4 @ 1/1250'th