• EF-Mount Lens/Full-Frame Format
• Aperture Range: f/4 to f/32
• Two Ultra-Low Dispersion Elements
• Super Spectra Coating
• Ring-Type Ultrasonic Motor AF System
• Optical Image Stabilizer
• Weather-Sealed Construction
• Detachable, Rotatable Tripod Collar
• Rounded 8-Blade Diaphragm

The EF 300mm f/4L IS USM offers portability and image quality. The lens features UD lens elements to improve optical performance and Image Stabilisation technology to reduce blur from camera movement.

High quality, stabilized telephoto lens

The EF 300mm f/4L IS USM is a compact telephoto lens featuring an Image Stabilizer that compensates for camera shake, allowing shutter speeds two stops slower than normal to be used without blur. Stabilization can be turned off in one direction to allow for panning.

L-series quality

The L-series is Canon's flagship professional lens range, representing the best in precision-designed EF optics. L-series lenses combine superior performance with superlative handling, and are resistant to dust and moisture.

Ultrasonic focusing

A ring-type ultrasonic motor drives autofocus extremely quickly, and in near silence. Excellent holding torque ensures the point of focus is reached accurately, without overshooting. Furthermore, full-time manual override is available, making it possible to adjust focus without leaving AF mode.

Super Spectra coating

Super Spectra coatings ensure accurate colour balance and enhance contrast. They also reduce flare and ghosting – a common problem caused by light bouncing off a camera's sensor.

Integration with E-TTL II flash metering

The lens passes distance information back to a compatible EOS camera's E-TTL II flash system to ensure optimal flash metering.