This is an underwater housing for the SONY NEX-5N with a 16mm (E 16mm F2.8) lens, rated to 40M. Purchased new in 2018, it has only been used once for underwater photography. *This housing is for use with the SONY NEX-5N with a 16mm lens (E 16mm F2.8). *However, I used it with a NEX-5. The preview button doesn't work, but the other buttons are operational. I hope those who want to try underwater photography will give it a try. Please understand that this is a used item.