This is a TAMRON 11-18mm wide-angle lens with a maximum aperture of F/4.5-5.6, ideal for landscape and architectural photography. - Brand: TAMRON - Model Name: SP AF 11-18mm F/4.5-5.6 LD ASPHERICAL (IF) - Focal Length: 11-18mm - Maximum Aperture: F/4.5-5.6 - Country of Manufacture: MADE IN JAPAN - Filter Diameter: 77mm SLR Lens Thank you for viewing. I purchased this as a used item. I used it a few times, but I no longer need it, so I am putting it up for sale.