Product Description

Compact L-series telephoto lens with an Image Stabilizer, which compensates for camera shake with the equivalent effect of a shutter speed two stops faster. Two Image Stabilizer modes are provided: Stabilizer Mode 1 (the same mode featured on the EF 75-300mm f/4-5.6 IS USM) and the new Stabilizer Mode 2, which steadies the image during horizontal or vertical panning. Mode 2 detects the panning direction automatically. The closest focusing distance is 4.9 feet (1.5 m).

Product Details

• Brand: Canon
• Model: CANON EF 300MM F4.0L IS USM
• Dimensions: 6.10" h x 6.10" w x 12.00" l, 2.00 pounds

Features

• EF mount; telephoto lens
• Ultra-low Dispersion glass with Fluorite elements; inner focusing ring; full-time manual focus; image stabilizer
• 300mm focal length
• f/4 maximum aperture
• Micro UltraSonic Motor (USM)

Amazon.com Product Description
Bring your subjects closer while shooting sports or wildlife with the Canon EF 300mm f/4L telephoto lens. The lens is equipped with Image Stabilizer (IS) technology, which compensates for camera shake by providing the equivalent effect of a shutter speed two stops faster. The camera provides two IS modes: Stabilizer 1, the same mode featured on the EF 75-300mm lens, and Stabilizer 2, which steadies the image during horizontal or vertical panning. The lens is also half the weight of the 300mm f/2.8L IS, with a close focus distance of 4.9 feet. And like all of Canon?s fixed focal length L-series lenses above 135mm, it?s compatible with Canon's EF 1.4x II and 2x II Extenders.

Specifications

• Focal length: 300mm
• Maximum aperture: f/4L
• Lens construction: 15 elements in 11 groups
• Angle of view: 8 degrees @ 15 feet
• Focus adjustment: Rear focusing system with USM
• Closest focusing distance: 4.9 feet
• Filter size: 77mm
• Dimensions: 3.7 inches in diameter and 8.7 inches long
• Weight: 2.6 pounds
• Warranty: 1 year

From the Manufacturer
Excellent optics and superb handling in a compact package with Image Stabilization. The IS allows safe hand holding at shutter speeds up to two stops slower than otherwise possible--making it even more useful in low-light levels. It’s less than half the weight of the 300mm f/2.8L IS, and it focuses to an incredibly close 4.9 ft/1.5m, filling the frame with a subject the size of a postcard. Like all of Canon’s fixed focal length L-series lenses above 135mm, it’s compatible with Canon’s EF Extenders 1.4x II and 2x II.

Long and Fast
A telephoto lens is essential to any serious photographer. For sports action, you will need a fast shutter speed and a long focal length. A large maximum aperture allows a faster shutter speed. In this telephoto lens line-up, the focal lengths range from 135mm to 300mm. If you want compactness, choose a lens with a smaller maximum aperture.

Customer Reviews

It's an L lens. What else do you need to know?
It's white. It's metal. It's glass. Some electronic stuff in there, too. It is incredible how humans can make these things. Amazing technology. Great stuff. If you can afford it, you know enough about it by now, don't you? Read up, boys. Then buy this one or something like it. But don't ever, ever, buy a piece of garbage plastic lens, and expect it to give you pleasure, as this one does.

It's a good lens but...
Bought the 300 f/4 thought it would be a good addition since it was light and image quality was good.

Got tired of it pretty quick though. F/4 just isn't wide enough for what I wanted to do.

Also as an owner of the 400 f/2.8, I got spoiled because few lenses out there can compete with it.

Sold the lens, bit the bullet and bought the 300 f/2.8.

Now that's a lens that can compete with the 400 f/2.8 in image quality.

Yes the 2.8 is 4x the price of the 4.0, but it's easily 4x the image quality.

Great Lens
Finally! I got this lens and its everything I thought it would be. Sharp! Easy to use and just great!