Canon Ultrasonic EF11-24mm f 4L USM Instruction Manual

Canon Ultrasonic EF11-24mm f 4L USM manual cover
Pages 13
Year 2014
Language(s)
English en

Canon Ultrasonic EF11-24mm f 4L USM Specification

The Canon Ultrasonic EF11-24mm f/4L USM Lens is a high-performance ultra-wide-angle zoom lens designed for professional photographers who demand exceptional image quality. With a focal length range of 11-24mm, it offers unparalleled versatility for capturing expansive landscapes, architectural marvels, and dynamic interior spaces. The lens features a constant maximum aperture of f/4, providing consistent exposure across the zoom range and enabling optimal performance in various lighting conditions.

Constructed with superior optical technology, the lens incorporates a combination of Super UD and UD elements, along with a specialized subwavelength coating, effectively minimizing chromatic aberrations and ghosting while enhancing contrast and color fidelity. The lens boasts a sophisticated optical design with 16 elements in 11 groups, contributing to its remarkable sharpness and clarity throughout the frame.

The Ultrasonic Motor (USM) ensures fast, accurate, and near-silent autofocus, making it ideal for both still photography and videography. Full-time manual focus override is available, allowing for precise focus adjustments even in AF mode. The robust build quality features weather-sealing and a fluorine coating on the front and rear elements, offering protection against dust and moisture, making it suitable for challenging environments.

The Canon EF11-24mm f/4L USM Lens is compatible with full-frame EOS cameras and provides a 126°05' angle of view at its widest setting. Its weight of approximately 1180 grams and dimensions of 108 x 132 mm make it a substantial yet manageable addition to a professional photographer's toolkit. This lens sets a benchmark for ultra-wide-angle zoom performance, combining cutting-edge optics with durable construction, ensuring it meets the rigorous demands of professional use.

Canon Ultrasonic EF11-24mm f 4L USM F.A.Q.

What are the best settings for landscape photography with the Canon Ultrasonic EF11-24mm f/4L USM Lens?

For landscape photography, set the aperture to f/8 or f/11 for a wider depth of field. Use a tripod to stabilize the camera and a low ISO setting, such as ISO 100, to minimize noise. Consider using a polarizing filter to enhance sky contrast and reduce reflections.

How do I clean the Canon EF11-24mm f/4L USM Lens to maintain optimal performance?

To clean the lens, use a blower to remove dust from the surface. Gently wipe the lens with a microfiber cloth, using lens cleaning solution if necessary. Avoid touching the lens elements with your fingers to prevent smudges.

What should I do if the autofocus on my Canon EF11-24mm f/4L USM Lens is not working properly?

First, ensure that the AF/MF switch on the lens is set to AF. Check the camera settings to ensure autofocus is enabled. Clean the lens and camera contacts with a dry cloth. If the issue persists, try using a different camera body to determine if the problem is with the lens or camera.

Can I use filters with the Canon EF11-24mm f/4L USM Lens?

Due to the bulbous front element, the Canon EF11-24mm f/4L USM Lens does not support standard front screw-in filters. However, it is compatible with rear gel filters that can be cut to size and placed in the designated filter holder at the back of the lens.

How can I prevent lens flare when using the Canon EF11-24mm f/4L USM Lens?

To minimize lens flare, avoid pointing the lens directly at bright light sources such as the sun. Use a lens hood to shield the front element from stray light. Position yourself so that the light source is behind you or to the side.

What is the minimum focusing distance of the Canon EF11-24mm f/4L USM Lens?

The minimum focusing distance of the Canon EF11-24mm f/4L USM Lens is approximately 0.28 meters (11 inches). This allows you to get close to subjects for dramatic wide-angle perspectives.

Is the Canon EF11-24mm f/4L USM Lens weather-sealed for outdoor use?

Yes, the Canon EF11-24mm f/4L USM Lens features weather sealing, which helps protect it against dust and moisture. However, it is recommended to use it with a weather-sealed camera body for optimal protection in harsh environments.

How does the Canon EF11-24mm f/4L USM Lens perform in low-light conditions?

The f/4 maximum aperture allows for decent performance in low-light conditions, but for best results, consider using a tripod and longer exposure times. Utilize the lens's wide-angle capabilities to capture more light in the frame.

What type of photography is the Canon EF11-24mm f/4L USM Lens best suited for?

The Canon EF11-24mm f/4L USM Lens is ideal for landscape, architecture, and interior photography due to its ultra-wide focal length, which allows for expansive views and unique perspectives.

How can I update the firmware of the Canon EF11-24mm f/4L USM Lens?

The Canon EF11-24mm f/4L USM Lens does not have user-updatable firmware. Firmware updates, when necessary, are typically done through service centers. Contact Canon support for guidance if you suspect a firmware update is needed.