The logo is a square separated into two diagonally. On the left side of the square there's a plus sign. And on the right side of the square there's a minus sign. The square is composed completely of black lines.
This Exposure icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.