Built-in Dual-mode Image Stabilizer,6-group configuration with 5 movable groups for optimal
high-magnification, zoom performance
Fluorite and Super-UD glass completely eliminate secondary spectrum for superb color rendition
Fast and silent Autofocus capability with Canon's ring USM, and AF mode on camera

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L-series super telephoto zoom lens equipped with an Image Stabilizer. The fluorite and Super UD-glass elements largely eliminate secondary spectrum. The floating system also ensures high picture quality at all focal lengths. The Image Stabilizer has two modes and it is compatible with Extenders 1.4x II and 2x II. 　 Sample Image MTF Charts

Innovative and exclusive technology has made Canon lenses the lens of choice for professionals and amateurs worldwide. The first EF lens with a zoom range from 100mm to 400mm, the EF 100-400mm f/4.5- 5.6L IS USM lens offers high resolution, superb contrast, neutral color balance, and Canon's built-in Image Stabilizer function.

Fluorite and Super UD glass completely eliminate secondary spectrum for superb color rendition. Auto-focusing is fast and silent with Canon's Ultra-Sonic Motor, and AF speed is further enhanced through an advanced, lightweight rear focusing design that incorporates a floating element for consistent image quality at all focusing distances from 5.9 ft. to infinity.

This lens is also equipped with a dual-mode Image Stabilizer suitable for panning as well as stationary subjects. With full-time manual focus, one-touch zooming with a wide grip, and a special ring that permits adjustment of zooming friction, this is a lens that's extremely easy to use, and ideal for a wide variety of applications including nature, wildlife, sports, and documentary photography.

　

Will mount to ANY Canon EOS AutoFocus Film or Canon Digital SLR Camera Including:
Rebel X, Rebel XS, Rebel G, Rebel GII, Rebel 2000, Rebel Ti, Rebel T2, Rebel K2, Rebel S, Elan, Elan II, Elan IIE, Elan 7, Elan 7E, Elan 7n, Elan 7ne, EOS 1V, EOS 3, EOS 30, EOS 33V, EOS 620, EOS 630, EOS 650, EOS 750, EOS 850, D30, D60, EOS 1Ds, EOS 1Ds Mark II, EOS 1D, EOS 1D Mark IIN, EOS 1D Mark II, D60, 10D, 20D, 30D, 5D, Digital Rebel (300D), Digital Rebel XT (350D), & Digital Rebel XTi (400D), etc.

　

Features & Specifications

Features:

• Built-in dual-mode Image Stabilizer reduces camera shake up to two full shutter speeds compared to hand-held shooting with conventional lens
• Fluorite and Ultra-low Dispersion elements suppress chromatic aberrations for outstanding sharpness, contrast and color fidelity
• Uses Ultrasonic motor for high-speed autofocus with full-time manual override - Tripod collar, lens hood and case supplied as standard accessories
• Drive System: Ring USM
• Drive Speed: H/0.54 to L/1.67 sec. or shorter (lens drive speed from infinity to min. focusing distance)
• Drive Noise: 40 dB or lower (Based on Canon's measuring standards.)
• Manual Focusing: Enabled with focus mode switch and focusing ring (full-time mechanical manual focusing provided).
• Focusing Range: 1.8m/5.9 ft. to infinity (at all focal lengths)
• Type: 6-group linear zoom (zoom extension: 79.6mm) Front of lens barrel moves.
• Type: Canon EF mount
• Filter Size: 77mm, P = 0.75mm (Up to 1 filter attachable)

Image size:   24x36mm Macro feature:   None Zoom type:   　   6-group linear zoom (zoom extension: 79.6mm)   Front of lens barrel moves 　 Lens mount type:   Canon EF mount Focal length, aperture ratio:   100-400mm, 1:4.5-5.6 Minimum focusing distance:   1.8m Manual focusing:   Set focus mode switch, operate manual focusing ring (full-time mechanical manual focusing system) Dimensions and weight:   92mm diameter x 189mm, 1360g (prototype weight) Magnification:   　   At 100mm - 0.06x   At 400mm - 0.20x 　 Angle of view at infinity:   　   Diagonal (43.2mm) - 24ø-6ø   Vertical (24mm) - 14ø-3ø   Horizontal (36mm) - 20ø-5ø 　 Field:   　   At 100mm - 393x591   At 400mm - 119x177 　 Coating:   Super spectra coating Filter size:   77mm diameter, P=0.75mm. (Up to 1 filter attachable) Lens configuration:   17 elements in 14 groups (fluorite element for G3, Super UD glass for G7) Aperture blades:   8 Aperture control:   Pulse control with EMD (enabled simultaneously with AF drive) Aperture value/indicator:   Maximum: f/4.5-5.6 (indicator on lens barrel), Minimum: f/32-38 (f/32-40 for lenses featuring 1/3-stop increments Rotation angle:   62ø Drive system:   Ring USM drive Drive noise:   40dB or less (based on Canon's Standard Test Method) Drive speed:   H/0.54 to L/1.67 seconds or shorter (lens drive speed from infinity to minimum focusing distance) Depth of field markings:   None Signal transmission:   　   EOS signal transmission, including 5 types of information (including absolute distance information)   1 - Lens mode   2 - Lens type   3 - Metering information   4 - Focal length   5 - AF drive information 　 Focusing range:   1.8m to infinity (at all focal lengths) Infrared index:   Provided Focusing extension mechanism:   Rear-focusing method, with focusing cam operating the floating elements, groups 4 and 6 Focusing distance limiting switch:   　   Two focusing distance ranges can be set   1 - 1.8m-infinity   2 - 6.5m-infinity

The Canon EF 100-400mm f/4.5-5.6 L IS USM Lens has an excellent focal length range that includes the longest focal length found in a Canon zoom lens. This long focal length and focal length range combine with very good image and build quality to make the 100-400 one of the most popular serious wildlife and sports lenses Canon sells.
 
To say that the Canon EF 100-400mm f/4.5-5.6 L IS USM Lens is a member of the Canon L Series quickly says a lot about this lens. Weighing 3 lb (1,380g) and measuring 3.6" x 7.4" (92.0 x 189.0)(DxL retracted), the 100-400 is solidly built and feels like it.
 
The push/pull zoom mechanism is possibly the most noticeable physical feature of this lens. While it works smoothly, it took me some time to get used to it. There is a ring on the back of the manual focus ring that adjusts the tension on the zoom part of the lens. That is a nice feature, but I find myself constantly adjusting the tension to get it just right for the moment. The ring also gets in the way of the manual focus ring - when making a manual focus adjustment, I often inadvertently change the zoom friction ring as well. Set the zoom friction too light and the lens extends by itself when pointed downward - fast and hard if set really loose. Set the friction too tight and zooming becomes difficult. So, it works as it is supposed to. Some prefer the push/pull design.
 
Some may consider the Canon EF 100-400mm f/4.5-5.6 L IS USM Lens to be a slow (aperture) lens. Starting at f/4.5, the 100-400 goes to f/5 around 130mm and finally to f/5.6 at approximately 250mm. A 100mm f4.5 lens is slow, but a 400mm f5.6 is not too bad (relatively speaking). Actually, to buy a faster 400mm lens will cost you a significant additional amount of money.
 
One of my favorite lens features found on the 100-400 is image stabilization. The image stabilizer helps significantly when handholding in low light - that is as long as you have a still subject. Keep in mind that the version of IS on this lens needs to be turned off when tripod-mounted. Not doing so may cause the image stabilizer to act erratically. You can estimate IS on this lens to help with 2 stops or so of shutter speed handholdability.
 
The Canon EF 100-400mm f/4.5-5.6 L IS USM Lens is slightly soft in the center wide open at the shorter focal lengths, but gets very sharp when stopped down one f-stop. My 100-400 is sharp wide open when the wide open aperture becomes f/5.6 (250mm or so) and is very sharp wide open at 400mm. Full frame corners are sharp wide open at all focal lengths with 200mm being slightly soft. Corners show slight improvement at a one f-stop narrower aperture. Considering the focal length range of this lens, the sharpness delivered is simply excellent.
 
The Canon EF 100-400mm f/4.5-5.6 L IS USM Lens' color and contrast are excellent. An 8-blade aperture helps with bokeh (foreground/background blur quality). Distortion ranges from mild barrel at 100mm to minor pincushion from 135-200mm to mild pincushion from 300-400mm. CA (Chromatic Aberration) is well controlled. Exposures are in line with my expectations. Flare has not been an issue for me with this lens.
 
The Canon EF 100-400mm f/4.5-5.6 L IS USM Lens' biggest negative to me personally is the strong vignetting noticeable toward the long end of the zoom range on a full frame body. At 400mm f/5.6, slight vignetting is even noticeable on a 1.6x FOVCF body. This exception aside, vignetting is very well controlled.
 
Equipped with Ring USM, the Canon EF 100-400mm f/4.5-5.6 L IS USM Lens focuses very fast, quietly - and possibly most importantly - accurately. FTM (Full Time Manual) focus is enabled. The manual focus ring has a small amount of play in it. The 100-400 obviously extends with focal length increase, but less obvious from the picture below is that it is an internally focusing lens - it does not change lengths or rotate an attached filter.

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CANON EF 100-400mm IS USM AF Lens

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