The SF1n (or SFXn) was an update of the SF1 introduced the previous year. It was the world's first autofocus single-lens reflex camera with built-in auto flash. Other than the photographer composing the image through the viewfinder, with a Pentax-F or FA lens attached, taking a photograph is automatic. My first "point and shoot" single-lens reflex.

The camera is shown with the excellent SMC Pentax-F 50mm f/1.7 lens.