Canon Ultrasonic EF70-300mm f 4.5-5.6 DO IS USM Instruction Manual

Canon Ultrasonic EF70-300mm f 4.5-5.6 DO IS USM manual cover
Pages 15
Year 2004
Language(s)
English en

Canon Ultrasonic EF70-300mm f 4.5-5.6 DO IS USM Specification

The Canon Ultrasonic EF70-300mm f/4.5-5.6 DO IS USM Lens is a versatile telephoto zoom lens designed for Canon's EOS DSLR cameras. It features a unique Diffractive Optics (DO) design that allows for a more compact and lightweight structure without compromising image quality. The lens covers a focal length range of 70-300mm, making it suitable for a variety of photography applications such as sports, wildlife, and portraiture. With a variable aperture of f/4.5-5.6, the lens balances depth of field control with low-light performance.

The lens is equipped with Canon's Image Stabilization (IS) technology, providing up to three stops of shake correction, which is particularly beneficial for handheld shooting at longer focal lengths. The Ultrasonic Motor (USM) ensures fast and silent autofocus, enhancing usability for both still photography and video recording. This lens construction includes 18 elements in 12 groups, with the incorporation of a three-layer DO element that effectively reduces chromatic aberrations and ghosting, delivering sharp and high-contrast images.

The minimum focusing distance of 1.4 meters allows photographers to capture close-up details with clarity. A circular aperture design with a 6-blade diaphragm contributes to pleasing background blur, or bokeh, enhancing subject isolation. The lens is compatible with 58mm filters, offering further customization for creative effects. It measures approximately 82.4mm in diameter and 99.9mm in length, and weighs around 720 grams, making it a portable option for photographers on the go. Overall, the Canon EF70-300mm f/4.5-5.6 DO IS USM Lens is an advanced piece of optical engineering, ideal for enthusiasts and professionals seeking high performance in a compact form factor.

Canon Ultrasonic EF70-300mm f 4.5-5.6 DO IS USM F.A.Q.

What are the key features of the Canon Ultrasonic EF70-300mm f/4.5-5.6 DO IS USM Lens?

The Canon EF70-300mm f/4.5-5.6 DO IS USM Lens features a Diffractive Optics (DO) design, Image Stabilization (IS), and an Ultrasonic Motor (USM) for fast and quiet autofocusing. It has a compact design and offers a versatile focal length range ideal for sports, wildlife, and travel photography.

How can I properly clean and maintain my Canon EF70-300mm DO IS USM Lens?

To clean the lens, use a soft, lint-free cloth or a blower to remove dust. For the lens element, use a lens cleaning solution and a microfiber cloth. Regularly check for dust and moisture, and store the lens in a dry, cool place to prevent fungal growth.

How does the Image Stabilization (IS) feature work on this lens?

The IS feature helps reduce camera shake by compensating for small movements during handheld shooting. It is particularly useful in low-light situations and when using slower shutter speeds, enabling you to capture sharper images.

What should I do if the autofocus on my Canon EF70-300mm lens is not working properly?

First, ensure that the lens is set to AF mode. Clean the lens contacts with a soft, dry cloth. If the problem persists, try using the lens on a different camera body to rule out camera issues. If autofocus still doesn't work, the lens may need professional servicing.

Can I use teleconverters with the Canon EF70-300mm DO IS USM Lens?

This lens is not compatible with Canon's EF Extender teleconverters. Using teleconverters may result in a loss of autofocus capabilities and image quality degradation.

How do I switch between autofocus and manual focus on this lens?

To switch between autofocus and manual focus, locate the AF/MF switch on the side of the lens barrel. Slide it to AF for autofocus and to MF for manual focus. In MF mode, you can adjust the focus manually using the focus ring.

What precautions should I take when using this lens in wet or humid conditions?

While the lens is robust, it is not weather-sealed. To protect it, use a rain cover or lens hood, and avoid exposing it to direct rain. After use in humid conditions, ensure the lens is thoroughly dried before storage to prevent fungal growth.

How can I achieve the best image quality with the Canon EF70-300mm DO IS USM Lens?

For optimal image quality, use a tripod to minimize camera shake, especially at longer focal lengths. Shoot with an aperture of f/8-f/11 for sharper images and consider using the lens's IS feature when shooting handheld.

Why is my Canon EF70-300mm lens producing blurry images?

Blurry images can result from camera shake, incorrect focus, or a slow shutter speed. Ensure the IS is on, use a faster shutter speed, and verify that the subject is in focus. If the issue persists, check for lens calibration needs.

Is the Canon EF70-300mm DO IS USM Lens suitable for video recording?

Yes, the lens can be used for video recording. Its USM provides quiet focusing, which is beneficial for video. However, be mindful of zoom noise, and consider using an external microphone for better audio quality.