This lens has been tested in store and is working as should do, This lens can be secured onto a Canon EF mount. Optics: Fourteen Elements in Twelve Groups Diaphragm: Nine Blades Rounded diaphragm, f/16 aperture. Size: 94.7mm 126.2mm 3.7in.×5.0in. Weight: 1,215g / 42.8oz. Close focus: 85cm/33.5in. Filter Thread: 86mm. Please like us on our Facebook Page, we are always posting offers and competitions at https://www.facebook.com/RegenKidderminster/