The canon ef 8 15mm f4l fisheye usm is first fisheye zoom lens offering a choice of full frame or circular image it is a full frame fisheye lens for cameras with 35mm aps h or aps c sensors plus circular fisheye option for cameras with 35mm sensors high quality images are delivered by an ud lens and an aspherical lens it features a reduction in ghosting and flare with subwavelength coating swc and super spectra coating