The canon 70 300mm features

Angle of view (horzntl, vertl, diagnl) 29º - 6º 50', 19º 30' - 4º 35',34º - 8º 15'
Lens construction (elements/groups) 15/10
No. of diaphragm blades 8
Minimum aperture 32-45
Closest focusing distance (m) 1.5
Maximum magnification (x) 0.26 (at 300mm)
Distance information Yes
Image stabilizer 3-stops
AF actuator Micro USM
Filter diameter (mm) 58
Max. diameter x length (mm) 76.5 x 142.8
Weight (g) 630
Magnification with Extension Tube EF12 II 0.32-0.04
Magnification with Extension Tube EF25 II 0.39-0.09

The Canon 70-300mm IS USM includes:
Front and rear Cap and User's Guide

The Canon ef 70 300mm f 4 5.6 is usm Reviews

- Quick focusing with no hunt issues in good light/contrast conditions. Image stabilisation works a treat - Even with one handed shooting. Circular aperture makes for pleasing focal/out of focus effects. No image issues for me throughout the focal length range. Nice weight. Balances well on 400D with battery grip. - Richard, Slough

- Easy to use. Very good image stabilisation. Excellent image quality - Simon, Ilford