Examples disclosed herein provide a computing device. As an example, the computing device includes a camera comprising a lens, and a housing comprising an opening extending through the housing, wherein the opening is to accommodate the lens. The housing further includes a shutter to selectively obscure the opening, and a mechanical trigger, upon receiving an electrical signal, to move the shutter to obscure the opening. Upon the mechanical trigger engaging the shutter to obscure the opening, the housing further includes a mechanical feature to block the mechanical trigger from moving the shutter to expose the opening