From Manufacturer
Don't waste time pulling a lens out of your bag or swapping optics with the Lensbaby Trio 28mm f/3.5 Lens. This pancake-style lens incorporates a rotating front mechanism allowing you to quickly select one of three different focus effects -Twist, Velvet, and Sweet- at a moment's notice. The Twist uses a Petzval-inspired design for a sharp center area surrounded by a swirl of twisty bokeh. Velvet has a dreamy central area with a soft focus look along with a soft glow. Sweet creates a sharp spot of focus in the center with a gradual fall-off to blur. All these can be carried without stuffing your bag with a variety of miscellaneous equipment.
Available here for Canon RF-mount cameras, the Trio will provide a wide-angle perspective that is well-suited to street photography. Also, it has a fixed f/3.5 optic that ensures predictable looks in a variety of situations. All the optics are multi-coated for minimal flare and ghosting and a manual focusing ring is included for focusing anywhere from 8" to infinity. Additionally, users can attach filters using the front 46mm thread for even more creative control.