I know this is a dumb question but I can't find the answer anywhere. I'm trying to figure out the functional focal length of my lens. I am using the M.Zuiko ED 12-50mm f3.5-6.3 EZ. When zooming in or out with the lens, the "mm" of the focal length is reported in my view finder ranging from 12mm to 50mm (obviously). Now the question I have is because this is a M43, the 12mm-50mm range is actually equivalent to 24-100mm. SO, does this mean when my view finder indicates the lens is shooting at a focal length of 17mm, that this is roughly equivalent to a 35mm focal length? Basically, I'm trying to decide between a the Zuiko 17mm and the Zuiko 25mm prime lens and am trying to get a feel for each focal length using my stock 12-50mm lens. Thanks for any help you can offer!