The Canon RF 28mm f/2.8 STM is a compact prime lens designed for the RF mount, offering a versatile wide-angle perspective for full-frame and APS-C cameras. Its optical design consists of 8 elements in 6 groups, allowing for a maximum aperture of f/2.8 that helps in low-light situations and creates a soft background blur, while the minimum aperture of f/22 provides deep focus for landscapes. Measuring only 24.7mm in length and weighing just 120g, this lens is exceptionally portable, making it a great companion for street photography or travel. It features an STM stepping motor for quiet and smooth autofocus, complemented by a control ring and an MF/AF switch for quick adjustments. With a minimum focus distance of 230mm and a 55mm filter diameter, it balances a wide 75° diagonal angle of view with a practical, lightweight build that doesn't bulk up your camera kit.