Specifications:

Focal length: 100-400mm
Maximum aperture: f/4.5-6.3
Minimum aperture: f/22-40
Lens mount: Canon EF
Lens construction: 16 elements in 11 groups
Diaphragm blades: 7, rounded
Minimum focus distance: 3.3 feet (1.0 m)
Maximum magnification: 0.24x
Filter diameter: 77mm
Dimensions: 3.5 x 4.4 inches (89.5 x 111.5 mm)
Weight: 1.5 pounds (697 g)

Features:

Versatile Focal Length Range: The 100-400mm range provides a wide variety of shooting options, from capturing distant subjects to filling the frame with details.

Compact and Lightweight: The lens is designed to be small and portable, making it easy to carry and use.

Excellent Image Quality: The lens features advanced optical elements and coatings to minimize aberrations and deliver sharp, detailed images.

Fast and Quiet Autofocus: The Ultrasonic Silent Drive (USD) autofocus motor ensures rapid and near-silent focusing performance.

Effective Image Stabilization: The built-in VC (Vibration Compensation) system helps to minimize camera shake, especially when shooting at slower shutter speeds.

Weather-resistant Construction: The lens is designed to be resistant to dust and moisture, making it suitable for outdoor shooting in various conditions.

Customizable Focus Hold Button: The lens features a customizable focus hold button for quick and easy focus control.

Rounded 9-Blade Diaphragm: The rounded diaphragm contributes to smooth bokeh effects.