Canon EF 300mm f/4L IS USM Telephoto Lens


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The Canon EF 300mm f/4L IS USM Autofocus Lens is controlled by a 16-bit microcomputer that minimizes blurred images due to camera shake. A special mode intelligently compensates just for up & down movement, providing sharp, stable images for panning. The optical design that compensates for all types of aberrations from infinity to the closest shooting distance of 4.9'. Two ultra-low dispersion (UD) glass elements ensure clear images and accurate color. Image Stabilization technology gives you the equivalent effect of up to 2 full shutter speeds slower handholdability than a conventional lens. And Canon's advanced ultrasonic focusing motor (USM) and rear focusing design provide silent, high speed autofocusing with fulltime manual focus override.

- Compact L-series Telephoto lens with Image Stabilizer

- UD elements eliminate secondary spectrum chromatic aberration

- Two-stage image stabilization; dual-axis camera shake correction or vertical axis only (for panning)

- Full-time manual focus override on lens


Canon Telephoto EF 300mm f/4.0L IS Image Stabilizer USM Autofocus Lens 

77mm Snap-On Lens Cap
Lens Dust Cap E (Rear)
Tripod Mount Ring
LZ1128 Lens Case
Built-In Lens Hood 


Angle of view (horzntl, vertl, diagnl)

6°50', 4°35', 8°15'

Lens construction (elements/groups)


No. of diaphragm blades


Minimum aperture


Closest focusing distance (m)


Maximum magnification (x)


AF actuator


Filter diameter (mm)


Max. diameter x length (mm)

90 x 221

Weight (g)


Magnification - Extension Tube EF12 II

0.30 - 0.04

Magnification - Extension Tube EF25 II

0.37 - 0.09

Lens hood


Hard case


Soft case


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