This is the original viewfinder that is compatible with all the Pen cameras that have a hot shoe powered accessory port. The 1400k dot screen provides a 100% field of view and a 1.5x magnification. The eyeport tilts up to 90 degrees vertical. Comes in black with a soft carrying pouch. US$250.
Thom's Mini Review: This is the better of the two EVFs that Olympus has made. It can be useful in bright light, but there's a bit of a display lag and even with 1400k dots the image is a bit coarse. I find it equivalent to a decent camcorder EVF, and the ability to tilt it up and look down into it is useful (if you need to look up at a viewfinder, you'll need to hold the camera upside down, but it can be done in a pinch). The eyecup on mine has a tendency to pop off when I'm not paying attention. Battery drain is high when using this EVF, so carry extra batteries.