Canon Ultrasonic EF24-105mm f 4L IS USM Instruction Manual

Canon Ultrasonic EF24-105mm f 4L IS USM manual cover

Pages 14

Year 2005

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Canon Ultrasonic EF24-105mm f 4L IS USM Specification

The Canon Ultrasonic EF24-105mm f/4L IS USM Lens is a versatile and high-performance lens designed for professional and advanced amateur photographers. It features a focal length range of 24-105mm, offering a broad zoom range that is ideal for a wide variety of shooting scenarios, from wide-angle landscapes to medium telephoto portraits. The lens maintains a constant maximum aperture of f/4 throughout the zoom range, allowing for consistent exposure settings and depth-of-field control.

Incorporating Canon's Ultrasonic Motor (USM) technology, the lens provides fast, precise, and near-silent autofocus, making it suitable for both still photography and video recording. The Image Stabilization (IS) system compensates for up to three stops of camera shake, enhancing the ability to capture sharp images in low light or at slower shutter speeds.

The optical construction comprises 18 elements in 13 groups, including one Super-UD glass element and three aspherical lenses, which minimize chromatic aberrations and distortions while ensuring excellent image quality with high resolution and contrast. The lens is part of Canon's L-series, denoting its superior build quality, and features robust weather sealing, protecting it against dust and moisture for reliable performance in challenging conditions.

Additionally, the lens offers full-time manual focus override, allowing photographers to fine-tune focus without switching out of autofocus mode. The Canon EF24-105mm f/4L IS USM Lens is compatible with all Canon EOS cameras, making it a flexible and reliable choice for a range of photographic tasks. Its combination of advanced optical technologies and high-quality construction makes it a popular choice among professionals seeking a dependable all-purpose zoom lens.

Canon Ultrasonic EF24-105mm f 4L IS USM F.A.Q.

How do I properly clean the Canon EF24-105mm f/4L IS USM lens?

To clean the Canon EF24-105mm f/4L IS USM lens, use a soft, lint-free cloth or a lens cleaning brush to remove dust. For smudges, apply a few drops of lens cleaning solution to a microfiber cloth and gently wipe the lens surfaces. Avoid applying liquid directly to the lens.

What should I do if the lens autofocus is not working correctly?

If the autofocus is not working, ensure the lens is correctly attached to the camera. Check that the autofocus switch on the lens is set to AF. Clean the contact points on the lens and camera with a dry, clean cloth. If the issue persists, reset the camera settings or consult Canon support.

How can I reduce lens flare when using the EF24-105mm f/4L IS USM lens?

To reduce lens flare, use the lens hood provided with the lens, avoid shooting directly into strong light sources, and position the light source at an angle. Additionally, ensure your lens is clean and free of smudges.

What is the best way to store the Canon EF24-105mm f/4L IS USM lens?

Store the lens in a cool, dry place in a padded camera bag. Keep it with the lens cap on to protect the glass. Consider using silica gel packs to prevent moisture buildup. Avoid storing the lens in direct sunlight or humid environments.

How do I perform a basic maintenance check on my lens?

Perform a basic maintenance check by inspecting the lens for dust or smudges on the glass elements, checking the smoothness of the zoom and focus rings, and verifying that the autofocus and image stabilization functions operate correctly. Regularly clean the lens and store it properly.

Why does my lens make a noise when focusing?

The noise during focusing could be due to the Ultrasonic Motor (USM) operation, which is generally quiet but may be audible in very quiet environments. If the noise is unusual or has changed over time, inspect the lens for damage or consult Canon support.

How can I achieve sharp images with the EF24-105mm f/4L IS USM lens?

To achieve sharp images, use a tripod to minimize camera shake, especially at slower shutter speeds. Enable the Image Stabilization (IS) feature, use a smaller aperture for greater depth of field, and ensure accurate focus on your subject.

What is the function of the Image Stabilization (IS) switch on the lens?

The Image Stabilization (IS) switch on the lens activates the IS feature, which reduces camera shake effects, allowing for sharper images at slower shutter speeds. It is particularly useful in low-light conditions or when shooting handheld.

Can I use the Canon EF24-105mm f/4L IS USM lens in adverse weather conditions?

The Canon EF24-105mm f/4L IS USM lens is weather-sealed and can be used in adverse conditions, but it is recommended to use a rain cover for heavy rain or dusty environments to provide additional protection.

How can I update the firmware for the EF24-105mm f/4L IS USM lens?

Lens firmware updates are typically handled through the camera body. Connect the camera to a computer with the Canon software and follow the instructions for updating the firmware. Check Canon's official website for available updates.