Canon is a Japanese multinational corporation and they are specialists in optical and imaging products. Their products include cameras, computer printers, steppers and photocopiers. Canon introduced a super telephoto lens called Canon EF 500mm f/4L IS USM Lens. The lens offers superb image quality and crystal clear sharpness. Canon EF 500mm f/4L IS USM lens is best suitable for wildlife and nature photography.
The lens gets constructed with a combination of 17 elements in 13 groups. The size of the lens is 147.32 x 385.82 mm (5.8 x 15.19 inches) (diameter x length). It is turned out to be a fixed focal length lens. The focal length of this lens is 500 mm. The lens minimum aperture is f/32 and the maximum aperture is f/4. The closest focusing distance offered by this lens is 4.5 m (177.6 inches, 14.8 feet). The diagonal angle of view (picture angle) of this lens is 5 degrees. This lens bears a filter of size 52 mm.
The Image Stabilization (IS) allows this lens to be handheld a full two stops lower than a 500 mm non-IS lens. The lens focusing is awesome. The lens contains a three position focus limiter switch which allows the focus distance to be in a specific range. The ranges are 4.5 m to 10 m, 10 m to infinite and 4.5 m to infinite. With the ring USM (Ultrasonic Motor), this Canon EF 500mm f/4L IS USM lens focuses very fast and accurate. The full-time manual focusing is also available.
The focus range could be a limited one because it improves focusing effect, locks the subject pretty well and reduces the focus hunting. The autofocus stop button is used to stop temporarily the auto focusing. This feature works nicely in AI servo mode. When the user set a specific distance in the focus preset feature then it can be activated at any time to shoot a certain thing with a single press of the focus preset button. This lens maintains excellent sharpness around the full frame corners.
EF 500mm f/4L IS USM lens has a negligible Chromatic Aberration (CA). A slight pincushion distortion is present in this lens. Vignetting is also seen around the corners. The color and contrast are very good in this lens. The background blur quality is excellent. The lens has a superior build quality. This lens comes with a Canon lens mount. The lens weighs 3.85 kilograms (136 ounces). Canon EF 500mm f/4L IS USM lens is priced around 6200 US Dollars.
Mon, 03 May 2010 19:27:49 +0000
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