See the Operation page for a discussion of the E-P1's full-time Live View using the LCD monitor as a viewfinder. Olympus also offers a the VF-1 optical viewfinder for the E-P1, available for $99.

The Olympus E-P3 retains the E-P2's accessory port, which allows use of either a VF-2 external electronic ... in the E-P3's external viewfinder yields the same 1.15x magnification as the ...