This is a Lens icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,000 icons, all in the same style and quality.
There is a cylinder and it is on top of a thinner cylinder. There is a small circle on the bottom-middle third of the bigger cylinder, and another thick line goes around the cylinder. The top shows a circle as a lens for a camera.