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Hi, I'm doing a distance-learning photography course with OCA and one of my first exercises is to find out where on the lens 50mm standard is. Bear with me here, this is new to me! The 4/3 lens is supposed to be double so if I'm looking for 50mm it should be around the 25mm area on the lens. However, I'm checking it by getting the image in the viewfinder to be the same size as what I can see with the naked eye and it shows on the lens as about 65mm. How can this be? I've taken the camera to the local Olympus dealer and they agree with my logic but cannot answer my question. Also asked Olympus and they have referred me to their tech support but have not been able to get through yet as this is overseas. Any comments would be greatfully received! thanks 
If you google why 50mm lens, you will find that the articles all state that 50 mm is near the range seen by the human eye. Near but not exactly the same. 50mm became the default for 35mm cameras. In fact you are probably more correct with your 65mm. I can't say any more, but the web site called shutterbox might tell you more - it's where I found most information.
Hope this helps.
Lynne
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