The Lensbaby Fisheye Optic is part of the Lensbaby Optic Swap System that allows you to swap the optics in your Lensbaby lens to achieve the exact result you want. The Fisheye Optic turns your Lensbaby Composer into a fun fisheye lens. Its wideangle 12mm focal length provides a 160 degree field of view and creates incredible fisheye images from as close as 1 inch away from the subject. It gives landscapes and interior shots a quirky twist and can even be used for strange portrait creations, if your subject suits the "back of a spoon" look. Although the Fisheye Optic has been designed specifically for use with the Lensbaby Composer, it can also be used with the Lensbaby Muse via an adapter, offering versatility as well as slightly bizarre images.