I am selling this item because I don't use it very often. There are no scratches or clouding on the lens. STM stands for Stepping Motor. It is used to drive the focus lens. Aspherical lenses were created to solve three issues: spherical aberration correction in large-aperture lenses, distortion aberration correction in wide-angle lenses, and miniaturization of zoom lenses. This feature allows the photographer to make final focus adjustments after autofocus; after one-shot AF, simply rotating the focus ring enables immediate manual focus. [Features] Diameter 68.2mm, thickness 22.8mm, weight approximately 130g. The thinnest and lightest EF pancake lens. By adopting a stepping motor (+ gear), the lens has been miniaturized, and quiet & high-speed autofocus has been achieved. Video shooting is also more comfortable. Minimum shooting distance 0.3m, shooting magnification 0.18x. The use of a circular aperture achieves beautiful bokeh. Due to its compact design, you can easily take snapshots, and it is also effective as a lens for portrait photography, allowing you to take pictures without feeling pressured. * When the camera's AF operation is [One-shot AF], after the AF operation is completed, turning the focus ring while the shutter is half-pressed allows you to adjust the focus as desired. ■ STM STM stands for Stepping Motor. It is used to drive the focus lens. STM has two types: a lead screw type with excellent quietness and smoothness, and a gear type that prioritizes miniaturization, and it features quiet and smooth driving. ■ Aspherical Lens Aspherical lenses correct spherical aberration in large-aperture lenses, distortion aberration in wide-angle lenses, and miniaturize zoom lenses. Aspherical lenses were created to solve these three issues. ■ Full-time Manual Focus Full-time Manual Focus allows the photographer to make final focus adjustments after autofocus; after one-shot AF, rotating the focus ring…