Thank you for viewing. This is the SIGMA Contemporary 23mm F1.4 DC DN, a single-focus lens for Canon RF mount (also known as Canon). I purchased it but haven't used it, so I'm putting it up for sale. Although the outer box is not included, all accessories are present. It's a new, unused item, only tested for functionality. I will do my best to provide sincere service, so thank you for your consideration.