Canon Ultrasonic EF24-70mm f 4L IS USM Instruction Manual

Canon Ultrasonic EF24-70mm f 4L IS USM manual cover
Pages 22
Year 2012
Language(s)
English en

Canon Ultrasonic EF24-70mm f 4L IS USM Specification

The Canon Ultrasonic EF24-70mm f/4L IS USM lens is a versatile and high-performance standard zoom lens designed for full-frame Canon EOS DSLRs. It features a focal length range of 24-70mm, making it suitable for various photography styles, from landscapes to portraits. The lens is part of Canon's renowned L-series, ensuring superior optical performance and durability. Its maximum aperture of f/4 remains constant throughout the zoom range, providing consistent exposure and depth of field control. The lens construction includes 15 elements in 12 groups, incorporating two aspherical and two Ultra-low Dispersion (UD) elements to minimize chromatic aberrations and ensure sharp, high-contrast images.

The lens is equipped with Canon's Image Stabilization (IS) technology, offering up to four stops of shake correction, which is particularly beneficial in low-light conditions or when shooting handheld. The Ultrasonic Motor (USM) provides fast, precise, and near-silent autofocus, enhancing the lens's suitability for both still photography and video recording. A full-time manual focus override allows for precise focusing adjustments without switching out of autofocus mode. The lens also features a 9-blade circular aperture, contributing to a pleasing bokeh effect in out-of-focus areas.

With a minimum focusing distance of 0.7 feet and a maximum magnification of 0.7x in macro mode, the lens is also capable of close-up photography. The build quality is robust, with dust and water-resistant construction, making it reliable for use in challenging environments. The lens has a filter diameter of 77mm and weighs approximately 600 grams, balancing portability and performance. The Canon EF24-70mm f/4L IS USM lens is a versatile tool for professional photographers seeking reliability, excellent image quality, and flexible shooting capabilities.

Canon Ultrasonic EF24-70mm f 4L IS USM F.A.Q.

How do I properly clean the Canon EF24-70mm f/4L IS USM lens?

To clean the lens, first use a blower to remove any loose dust or debris. Then, gently wipe the lens with a microfiber cloth, lightly dampened with lens cleaning solution. Avoid using excessive force to prevent scratching the lens surface.

What is the best way to store the Canon EF24-70mm f/4L IS USM lens when not in use?

Store the lens in a cool, dry place, ideally in a padded camera bag or a dedicated lens case. Ensure that the lens cap is on to protect the glass, and consider using silica gel packs to prevent moisture buildup.

Why is the autofocus not working on my Canon EF24-70mm f/4L IS USM lens?

Ensure that the lens is correctly attached to the camera body. Check if the lens is set to autofocus mode (AF), and that the camera settings do not override this. If the issue persists, try cleaning the contacts on the lens and camera body with a dry cloth.

How can I reduce lens flare when using the Canon EF24-70mm f/4L IS USM?

To minimize lens flare, use a lens hood to block stray light. Additionally, avoid shooting directly into strong light sources and consider changing your shooting angle.

What should I do if there is dust inside the Canon EF24-70mm f/4L IS USM lens?

If dust is inside the lens, it is best to take it to a professional service center for cleaning. Attempting to disassemble the lens yourself may void any warranties and could cause damage.

How do I enable image stabilization on the Canon EF24-70mm f/4L IS USM lens?

Image stabilization (IS) can be enabled by switching the IS switch on the side of the lens to the "ON" position. Ensure that your camera settings do not disable IS functionality.

Can I use filters with the Canon EF24-70mm f/4L IS USM lens, and if so, what size?

Yes, you can use filters with this lens. The Canon EF24-70mm f/4L IS USM lens supports filters with a diameter of 77mm.

What should I do if the zoom ring on my Canon EF24-70mm f/4L IS USM lens is stiff?

If the zoom ring is stiff, ensure there are no obstructions or debris in the mechanism. If the problem persists, it is advisable to take the lens to an authorized service center for inspection and maintenance.

How can I achieve the best bokeh effect with the Canon EF24-70mm f/4L IS USM lens?

For a smooth bokeh effect, use a wide aperture (such as f/4) and position your subject far from the background. The longer focal length (around 70mm) can also enhance the effect.

What precautions should I take when using the Canon EF24-70mm f/4L IS USM in wet conditions?

While the lens is weather-sealed, it is advisable to use additional protective gear such as a rain cover to prevent moisture entry. After use in wet conditions, ensure the lens is thoroughly dried before storage.