Canon Ultrasonic EF70-300mm f 4-5.6 IS USM Instruction Manual

Canon Ultrasonic EF70-300mm f 4-5.6 IS USM manual cover
Pages 14
Year 2005
Language(s)
English en

Canon Ultrasonic EF70-300mm f 4-5.6 IS USM Specification

The Canon Ultrasonic EF70-300mm f/4-5.6 IS USM Lens is a versatile telephoto zoom lens designed for Canon's EOS DSLR cameras, offering a focal length range of 70-300mm. This lens is equipped with an Ultrasonic Motor (USM) which enables fast and near-silent autofocus, making it ideal for wildlife, sports, and portrait photography. It features a variable aperture of f/4-5.6, allowing for flexibility in different lighting conditions. The lens incorporates an Image Stabilization (IS) system that compensates for camera shake, providing up to three stops of stabilization for sharper handheld shots, especially beneficial at longer focal lengths.

Optically, the lens is constructed with 15 elements in 10 groups, including one ultra-low dispersion (UD) element that minimizes chromatic aberrations for improved image clarity and color fidelity. The lens utilizes a circular aperture diaphragm, enhancing the quality of out-of-focus areas or bokeh. With a minimum focusing distance of 1.5 meters, it allows for relatively close-up shooting opportunities. The lens also features a focus mode switch, enabling easy toggling between autofocus and manual focus.

The Canon EF70-300mm f/4-5.6 IS USM is designed with practicality in mind, weighing approximately 630 grams and measuring about 142 mm in length, making it portable for a telephoto lens. Its construction includes a robust, high-quality exterior finish that aligns with Canon's professional standards. The lens is compatible with Canon's full-frame and APS-C format DSLRs, providing a field of view equivalent to 112-480mm on APS-C sensors. Overall, this lens offers a blend of performance and convenience, making it a popular choice for photographers seeking a reliable and flexible telephoto solution.

Canon Ultrasonic EF70-300mm f 4-5.6 IS USM F.A.Q.

How can I achieve the best image stabilization with the Canon Ultrasonic EF70-300mm f/4-5.6 IS USM Lens?

To achieve optimal image stabilization, ensure the IS switch on the lens is turned on. Use Mode 1 for general photography and Mode 2 for panning shots. Hold the camera steady and press the shutter button halfway to activate the stabilization system before taking the shot.

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

First, verify that the AF/MF switch on the lens is set to AF. Clean the lens and camera contacts with a microfiber cloth. If the issue persists, try using the lens on another camera body to determine if the problem is with the lens or the camera.

How do I maintain the Canon EF70-300mm lens to ensure its longevity?

Keep the lens clean by using a lens brush and microfiber cloth. Store it in a dry, cool place and use lens caps when it's not in use. Periodically check for dust or mold inside the lens and consider professional servicing if necessary.

Can I use the Canon EF70-300mm lens for macro photography?

While the lens is not specifically designed for macro photography, you can use it for close-up shots by setting it to the longest focal length (300mm) and using a close-up filter to reduce the minimum focusing distance.

What is the best way to clean the lens elements of the Canon EF70-300mm lens?

Use a blower to remove loose dust, then gently clean the lens with a microfiber cloth or lens cleaning tissue. For stubborn spots, apply a small amount of lens cleaning solution to the cloth and clean in a circular motion.

How can I prevent lens flare when using the Canon EF70-300mm lens?

To prevent lens flare, use a lens hood and avoid shooting directly into bright light sources. Position yourself so that the light source is at an angle to the lens, or use your hand to shade the lens.

Is it possible to use the Canon EF70-300mm lens with a Canon teleconverter?

The Canon EF70-300mm f/4-5.6 IS USM lens is not compatible with Canon teleconverters. Using a teleconverter may affect autofocus performance and image quality.

What are some common troubleshooting steps if the lens is not recognized by the camera?

Ensure that the lens is properly mounted on the camera. Clean the contacts on both the lens and the camera body. Try resetting the camera settings and updating the camera firmware. If the problem persists, test the lens on another camera body.

How do I protect my Canon EF70-300mm lens from environmental damage?

Use a UV filter to protect the front element, and ensure the lens is weather-sealed when shooting in adverse conditions. Carry silica gel packets in your camera bag to absorb moisture and use a waterproof cover when necessary.

What is the ideal shutter speed to use with the Canon EF70-300mm lens for handheld shooting?

For handheld shooting, use a shutter speed that is at least 1/focal length of the lens. For example, at 300mm, use a shutter speed of at least 1/300s. Utilize image stabilization to help reduce camera shake at slower speeds.