Construction:10 Groups/ 13 ElementsAngle of view:12°-5°F stop range:5-32Closest Focusing Distance:98.4in. (2.5m)Maximum Magnification:1:5.0Filter Size:86mmDimensions (Length x Diameter):8.9 x 3.7in. (227mm x 93mm)Weight:43.6 oz. (1237gm)This is a new zoom lens from Tamron that lets you bring your far away subjects up close while compressing the distance between the main subject and the background for professional-looking results. Even while covering up to a 500mm that enables you to take ultra telephoto shots of subjects further than the eye can see its design is extremely lightweight and compact. When mounted on an APS-C size digital SLR camera it provides a focal length equivalent to a 760mm for super ultra telephoto imaging.