Canon EF 500mm f/4L IS USM Super Telephoto Lens for Canon SLR Cameras – Product Description:
Next-generation super telephoto L-series lens with an Image Stabilizer, it’s one of the world’s best lenses for wildlife and nature photography. The optical system is newly designed with a maximum aperture of f/4. One fluorite element and two UD-glass elements effectively correct aberrations resulting in sharp and excellent delineation.
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Canon EF 500mm f/4L IS USM Super Telephoto Lens for Canon SLR Cameras – Customer Review:
THE BEST 500MM WILDLIFE LENS!
I needed more reach than 400mm gave on my EOS 1D, so I purchased Canon’s 500mm f/4L IS three years ago. It’s incredibly sharp out to the corners at f/4. With bird and mammal portraits, you see every feather, every hair.
The lens is light enough to use on a Wimberley Sidekick. Some claim to be able to handhold it, but I think its eight-plus pound weight is a bit much for that. I carry mine in a long lens case with backpack harness from Kinesis Gear.
This lens’ image stabilization works very well. I’ve used it on a tripod with one-second shutter speeds and good telephoto technique, and gotten sharp, publishable images.
With an EOS 1D or 1Ds, lens and camera are rain-proof in mild storms.
I also got mine through Adorama, and had no problem with delivery or post-sale advertising.
If you buy one expensive long lens for wildlife, choose this one.