User manual
Canon EF 200-400mm f 4L IS

User Manual for Canon EF 200-400mm f 4L IS USM Extender 1.4x Lens

• Product category: Uncategorized Canon
• Brand: Canon
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
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Product description

• Super telephoto zoom is designed for full-frame Canon EF-mount DSLRs, however can also be used with APS-C models where it provides a 320-640mm equivalent focal length.

• Built-in 1.4x extender allows you to instantly extend your reach to 280-560mm (or 448-896mm equivalent with APS-C cameras) simply by flipping the left-hand switch. Since the extender is integrated within the lens housing, it is optically matched to the lens for improved imaging performance and also fully maintains the lens's weather sealing.

• Constant f/4 maximum aperture, without the teleconverter in position, offers consistent illumination throughout the zoom range. When the 1.4x teleconverter is engaged, the maximum aperture is effectively f/5.6.

• One fluorite element and four ultra-low dispersion elements are used to greatly reduce color fringing and chromatic aberrations in order to achieve greater clarity and color accuracy.

• Super Spectra coating has been applied to individual elements to minimize ghosting and flare for greater contrast and color neutrality when working in strong lighting conditions.

• An Optical Image Stabilizer helps to minimize the appearance of camera shake by up to four shutter speed stops to better enable working in low-light conditions and with slower shutter speeds. Three distinct IS modes are available: standard single-shot mode, a panning-optimized mode, and a mode that only activates the Image Stabilizer during the exposure.

• A ring-type Ultrasonic Motor (USM), along with optimized focusing algorithms and a high-speed CPU, is employed to deliver fast, precise, and quiet autofocus performance as well as full-time manual focus override.

• Focus Preset function is available to quickly recall a programmed focusing position.

• Focus Limiter switch lets you constrain the focusing to different ranges for faster performance to suit different applications.

• A Power Focus setting is available, and allows you to electronically and smoothly adjust your focus position to suit video recording. This setting utilizes a dedicated ring in front of the main focusing ring and allows you to use one of two different focusing speeds.

• Rounded nine-blade diaphragm contributes to a pleasing out of focus quality that benefits the use of shallow depth of field and selective focus techniques.

• As a member of the esteemed L-series, this lens is sealed against dust and moisture for working in inclement environmental conditions.

• Fluorine-coating on exposed elements affords protection to the optical system, resists smudging and fingerprints, and is easier to clean.

• Removable rotating tripod collar is included and benefits working with the lens atop a tripod or monopod.

• Compatible with optional EF 1.4X and EF 2X teleconverters.

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Technical parameters

Focal Length	200 to 400mm
Maximum Aperture	f/4
Minimum Aperture	f/32
Lens Mount	Canon EF
Format Compatibility	Full-Frame
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