Can any Panasonic, Nikon, Or Canon lenses fit on a Olympus EVOLT E-300?

I'm looking into lenses for my E-300 and they are difficult to find in my price range. Does anyone know if other lenses from other companies can fit on my camera. My camera is a Four-thirds (4/3) mount, NOT MICRO. Can others fit, or would any adapters work to allow the lenses to fit. I don't need them to work with auto-focus, just fit to be about to use manually.

If you can't find a Panasonic lens in your price range (also 4/3rds), you will have to look for lenses made by Sigma or Tamron.

By the time you buy an adapter for a Canon or Nikon lens may raise the cost of the lens close to what it will cost for an Olympus or Panasonic lens and it will make the lenses fully manual and you will lose a full stop of light.

No, only 4/3 mount lenses fit - I think Sigma make a couple of compatible lenses, though, check their website.

You'll lose not only autofocus, but aperture control unless the lenses have aperture rings, and probably most of your exposure modes - so adapting other lenses often isn't worth the hassle and expense.