Canon Ultrasonic EF24-70mm f 2.8L II USM Instruction Manual

Canon Ultrasonic EF24-70mm f 2.8L II USM manual cover
Pages 13
Year 2012
Language(s)
English en

Canon Ultrasonic EF24-70mm f 2.8L II USM Specification

The Canon Ultrasonic EF24-70mm f/2.8L II USM Lens is a high-performance standard zoom lens designed for full-frame Canon DSLR cameras. Renowned for its versatility, the lens covers a focal length range from wide-angle 24mm to medium telephoto 70mm, making it ideal for landscape, portrait, and event photography. It features a constant maximum aperture of f/2.8, allowing for consistent exposure and depth-of-field control across the zoom range, which is particularly beneficial in low-light conditions. The optical construction comprises 18 elements in 13 groups, incorporating one Super UD (Ultra-low Dispersion) and two UD lens elements, along with three aspherical lenses that significantly reduce chromatic aberrations and distortions, ensuring high image sharpness and clarity.

The lens is equipped with Canon's Ultrasonic Motor (USM) technology, which provides fast, precise, and virtually silent autofocus operation, making it suitable for both still photography and video recording. Full-time manual focus override is available for users who require fine-tuning without switching from autofocus mode. The build quality of the EF24-70mm f/2.8L II USM is robust, with weather-sealed construction to protect against dust and moisture, making it durable for challenging shooting environments. The lens features a circular 9-blade diaphragm, contributing to a pleasing bokeh effect. Its minimum focusing distance is 0.38 meters, allowing close-up shots with a maximum magnification of 0.21x. Weighing approximately 805 grams and measuring 88.5mm in diameter by 113mm in length, it balances well on professional DSLR bodies. The lens is compatible with 82mm filters and includes a lens hood and case for additional protection.

Canon Ultrasonic EF24-70mm f 2.8L II USM F.A.Q.

What are the key features of the Canon Ultrasonic EF24-70mm f/2.8L II USM Lens?

The Canon EF24-70mm f/2.8L II USM Lens features a constant f/2.8 maximum aperture, a ring-type Ultrasonic Motor (USM) for fast and silent autofocus, and superior optics with Super UD and aspherical lens elements to minimize chromatic aberrations. It is also weather-sealed for enhanced durability.

How do I properly clean the Canon EF24-70mm f/2.8L II USM Lens?

To clean the lens, use a blower to remove dust and debris. Use a lens brush for gentle cleaning if needed. For smudges, apply a small amount of lens cleaning solution to a microfiber cloth and gently wipe the lens in a circular motion. Avoid using excessive pressure.

What should I do if the autofocus is not working on my Canon EF24-70mm f/2.8L II USM Lens?

Ensure that the lens is securely attached to the camera. Check that the autofocus switch on the lens is set to "AF." If the problem persists, clean the lens and camera contacts with a dry microfiber cloth. If the issue continues, consider contacting Canon support.

How can I reduce lens flare when using the Canon EF24-70mm f/2.8L II USM Lens?

To reduce lens flare, use the lens hood provided with the lens to block stray light. Avoid pointing the lens directly at bright light sources, such as the sun. You can also try adjusting the angle of the shot to minimize flare.

What is the minimum focusing distance of the Canon EF24-70mm f/2.8L II USM Lens?

The minimum focusing distance of the Canon EF24-70mm f/2.8L II USM Lens is 0.38 meters (1.25 feet) throughout the entire zoom range.

How do I update the firmware of the Canon EF24-70mm f/2.8L II USM Lens?

Canon EF24-70mm f/2.8L II USM Lens does not have user-updatable firmware. Firmware updates, if necessary, would need to be performed by a Canon service center.

What type of photography is the Canon EF24-70mm f/2.8L II USM Lens best suited for?

The Canon EF24-70mm f/2.8L II USM Lens is versatile and ideal for a range of photography styles, including landscapes, portraits, weddings, and events. Its wide aperture and zoom range make it suitable for low-light conditions and creative compositions.

Can I use filters with the Canon EF24-70mm f/2.8L II USM Lens?

Yes, the Canon EF24-70mm f/2.8L II USM Lens has a 82mm filter thread, allowing you to attach various types of filters, such as UV, polarizing, or ND filters, to enhance your photography.

What should I do if I notice vignetting in my photos with the Canon EF24-70mm f/2.8L II USM Lens?

Vignetting can often be reduced by stopping down the aperture. You can also apply lens profile corrections in post-processing software like Adobe Lightroom or Photoshop to minimize the effect.

How should I store the Canon EF24-70mm f/2.8L II USM Lens when not in use?

Store the lens in a cool, dry place, ideally in a padded camera bag or case. Use the lens caps to protect the front and rear elements. Consider using a silica gel pack to avoid moisture buildup, especially in humid environments.