Sample Images: Olympus M.ZUIKO Digital ED 300mm f4.0 IS PROSample Images: Olympus M.ZUIKO Digital ED 300mm f4.0 IS PRO(All images copyright Photography Online, Inc.)
Still Life tests, Olympus E-M1 body (sub-frame sensor)
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VFA Target, Olympus E-M1 body (sub-frame sensor)
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| 300mm f/4 | |
 Upper Left |  Center |
| 300mm f/8 | |
 Upper Left |  Center |
| 420mm f/5.6 (with 1.4x teleconverter) | |
 Upper Left |  Center |
| 420mm f/8 (with 1.4x teleconverter) | |
 Upper Left |  Center |