Canon Ultrasonic EF100-400mm f 4.5-5.6L IS II USM Instruction Manual

Canon Ultrasonic EF100-400mm f 4.5-5.6L IS II USM manual cover
Pages 21
Year 2014
Language(s)
English en

Canon Ultrasonic EF100-400mm f 4.5-5.6L IS II USM Specification

The Canon Ultrasonic EF100-400mm f/4.5-5.6L IS II USM Lens is a versatile telephoto zoom lens designed for professional and advanced amateur photographers. This lens is part of Canon's L-series, known for its superior optics and robust build quality. It features a focal length range of 100-400mm, allowing for flexibility in capturing distant subjects, making it ideal for wildlife, sports, and action photography. The lens has a variable aperture of f/4.5-5.6, enabling decent light-gathering capability in varying lighting conditions.

A standout feature of this lens is its advanced Image Stabilization (IS) system, which offers up to four stops of correction, significantly reducing the effects of camera shake and allowing for sharper handheld shots. The Ultrasonic Motor (USM) ensures fast, accurate, and nearly silent autofocus, which is particularly beneficial in quiet environments or when shooting video. The lens construction includes 21 elements in 16 groups, incorporating one fluorite and one super UD element to minimize chromatic aberrations and enhance image clarity and color fidelity.

The lens sports a weather-sealed construction, providing resistance against dust and moisture, and its fluorine coatings on the front and rear elements help reduce smudging and fingerprints. Additionally, it features a nine-blade circular diaphragm, contributing to a pleasing bokeh effect. The lens is compatible with Canon's full-frame and APS-C DSLR cameras and comes with a tripod mount ring for improved stability during long shooting sessions. Its versatile range and advanced features make the Canon EF100-400mm f/4.5-5.6L IS II USM a compelling choice for photographers seeking high performance in a telephoto zoom lens.

Canon Ultrasonic EF100-400mm f 4.5-5.6L IS II USM F.A.Q.

How do I enable Image Stabilization on the Canon EF100-400mm f/4.5-5.6L IS II USM lens?

To enable Image Stabilization, locate the IS switch on the side of the lens and slide it to the 'ON' position. This feature helps reduce camera shake, especially in low-light conditions or when using slower shutter speeds.

What is the best way to clean the Canon EF100-400mm lens?

To clean the lens, use a blower to remove loose dust and a microfiber cloth for the lens elements. For stubborn smudges, use lens cleaning solution applied to the cloth. Avoid using harsh chemicals or rough materials that could scratch the lens.

How can I reduce lens flare when using this lens?

To reduce lens flare, attach the lens hood provided with the lens. This helps block stray light from entering the lens. Additionally, avoid shooting directly into strong light sources.

What should I do if the autofocus is not working properly?

First, ensure the lens is set to AF mode using the AF/MF switch. Check for any obstructions on the lens contacts and clean them if necessary. If the problem persists, try attaching the lens to a different camera body to rule out camera issues.

Can I use teleconverters with the Canon EF100-400mm lens?

Yes, the Canon EF100-400mm lens is compatible with Canon EF 1.4x and 2x teleconverters. However, using teleconverters may affect autofocus speed and aperture. Ensure your camera is compatible with the effective aperture.

How do I switch between different focusing distances on the lens?

Use the focus limiter switch on the lens barrel to choose between different focusing ranges, such as full range or a limited range, to reduce autofocus time and increase speed.

What maintenance is recommended for the Canon EF100-400mm lens?

Regularly clean the lens and contacts, store it in a dry place, and use a protective filter. Periodically check for firmware updates and consider professional maintenance every few years.

How can I achieve better sharpness and clarity with this lens?

For optimal sharpness, use a sturdy tripod and avoid using the lens at its maximum aperture. Stopping down slightly can increase sharpness. Also, ensure proper focus settings and use Image Stabilization when required.

What are the signs that the Image Stabilization system needs repair?

If you notice unusual noises, lack of stabilization effect, or erratic behavior when IS is enabled, the system might need servicing. Contact Canon support for assistance.

How do I properly store the Canon EF100-400mm lens when not in use?

Store the lens in a dry, cool place, ideally in a padded camera bag or case. Use a lens cap and rear cap to protect the elements and contacts. Avoid exposure to extreme temperatures and humidity.