The Sony Optical Viewfinder is for use exclusively with the 16mm f/2.8 Alpha NEX Lens. This viewfinder exhibits edge-to-edge sharpness and low reflection via its five multi-coated glass elements. It has a large 5.0mm diameter exit pupil and a long 15.0mm eye relief so that it can even be used while wearing eyeglasses and sunglasses. It is designed for use with the Sony Alpha NEX-3 and NEX-5 cameras.
Note:
This viewfinder will not work with any other lens but the 16mm f/2.8 Alpha NEX lens, and is only compatible with the Sony Alpha NEX-3 and NEX-5 cameras.