TAMRON A06 AF28-300MM F/3.5-6.3 XR Ultra Zoom Lens for CANON (Model A06E) Extra Refractive Index ( XR ) glass reduces optical length of lens through high refractivity LD ( Low Dispersion ) and AD ( Anomalous Dispersion ) glass minimize loss of sharpness due to color blurring at the tele end of the focal range, ensuring vivid, quality imaging Angle of View - 75 - 8 degrees Type of Zooming - Rotation Diaphragm Blades - 9