The Sony FDA-SV1 Optical Viewfinder features: Compose your shots with more accuracy using an optical viewfinder. Designed for use with your ? NEX-3 or NEX-5 camera, the FDA-SV1 viewfinder offers a great alternative to composing your shots on the LCD. This optical viewfinder with all glass lenses provides clear and sharp images even in the corners. There's also multi-coating on the glass....

The Canon MA-300 Microphone Adapter features: Camcorder Microphone Adapter connects (2) XLR style microphones. It attaches to the camcorder's advanced accessory shoe, providing power and connections without any wires.

The Olympus VF-2 Electronic Viewfinder features: The VF-2 Live Finder, for the E-P2 or E-PL1, easily slides into the camera's accessory port and hot shoe when needed - for example, when shooting in direct sunlight. t also tilts up to 90°, a real benefit when composing shots at low angles for dramatic or practical purposes.