This 75-300mm f/4.0-5.6 LD Macro AF Zoom Lens for Nikon from Tamron is a lightweight, compact telephoto macro zoom with a maximum magnification ratio of 1:3.9. Excellent background blur to highlight the main subject in portraiture. Subjects as close as 4.9' can be shot at all focal lengths. LD (Low Dispersion) glass is incorporated with the lens, resulting in clear sharp images free of chromatic aberration. This lens was designed for Tamron for use with Nikon film cameras.