Ultra-wide field of view mixed with a compact and portable design, the. Canon RF 16mm f/2.8 STM. Is a sleek everyday wide-angle prime. Blending a compact, lightweight design with a bright maximum aperture, this rectilinear ultra-wide comes in handy when photographing interiors and architectural subjects, as well as broad landscape views and astrophotography scenes. This lens, serial number, is one of the best that you’ll find. It’s been thoroughly inspected, cleaned, sanitized, and tested on camera, and it’s as close to flawless as any I’ve seen. And, of course, everything works just as it should. The lens comes as pictured, with Canon front and rear caps. Photos are of the actual items being offered for sale. They are not touched-up, Photo Shopped, or otherwise altered.