Canon EF 20mm f/2.8 USM Lens
maker: Canon
focal length: 20 mm
max aperture: f/2.8
angle of view: 94°
filter size: 72 mm
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Wide-angle lenses let you capture more of the image by broadening the angle of view and increasing the depth of field, thereby bringing more of the area into focus. The lenses also provide a unique perspective by expanding the apparent distance between the foreground and the background. This Canon 20mm f/2.8 is no exception, with such additional features as a floating rear focusing system with an Ultra Sonic Motor (USM), a 0.8-foot close focusing distance, and a 94-degree diagonal angle of view. As with all Canon lenses, the 20mm lens carries a one-year warranty.
Ultra-wide-angle lens for serious applications. Easy to hold and carry at 14.3 oz. (405g). Floating rear focusing system. Sharp images are obtained at all subject distances.
The optical performance, fast f/2.8 speed and ultra-wide-angle coverage make this a great choice for many applications, like interiors, scenics, travel and photojournalism. It uses a floating optical system for excellent sharpness even at its minimum focusing distance of under 10 inches (0.25m), and with a ring-type USM and full-time manual focusing capability, offers the speed and handling pros expect.
If you need an ultra-wide angle and a large aperture, one of the following lenses will fit the bill. Ultra-wide-angle lenses can capture scenes beyond your natural field of vision. The EF 15mm f/2.8 Fisheye, the widest of them all, has a 180° angle of view. For more normal-looking wide-angle shots, there are longer wide-angle lenses up to 35mm with the maximum aperture you need.
Photos Taken with this Camera
Related Articles
Below is a list of articles in which this lens is discussed, or at least mentioned, on this site.
Update on Zoom Reduction (sep 2, 2011)
Since I wrote about eliminating my zoom lenses, I’ve used my Canon 70-300mm f/4.5-5.6 DO IS USM zoom lens only three times. Of those photos, I’ve only used five of the photos I took with it.
Prime and Full Size (jul 22, 2009) ✨
Although prime lenses (i.e., non-zoom lenses) are limited to one focal length, there are some advantage to them over popular zoom lenses. This article provides examples and advice to help you decide whether to buy prime lenses.
Understanding Exposure Settings (feb 15, 2009)
There are three primary settings on a camera that are related to exposure: shutter duration, aperture, and ISO. This article provides some basic analogies to help beginners to understand these aspects of a camera.