18-55Is Vs. 18-55 Canon
Canon's popular Rebel series of digital SLR cameras usually come with a what is called a kit lens, a basic lens that covers a limited zoom range and is enough to get novice photographers started. Canon's most popular kit lens is the 18-55. As of the time of publication, the 18-55 lens is designated IS II, for second-generation image stabilization. It replaced an earlier version that has no image stabilization, and there are several differences between the lenses.
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Image Stabilization
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The IS version of the 18-55 lens has an optical image stabilizer built into the lens that enables hand-held shooting at up to four stops faster than the non-IS version of the lens. This can help for low light shots, especially in situations where you might not be able to use a flash and you don't have a tripod or monopod to mount the camera to.
Focusing
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There is a slight difference in the close focus of the non-IS and IS versions of the 18-55 lens: the non-IS has a minimum close-focus distance of 9 inches/.28 m; the IS version has a close-focus distance of 9.8 inches/.25 m. Both cover the same diagonal field of view.
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EF-S
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Both versions of the 18-55 lenses carry the EF-S designation, which means they only work with the EF-S mount cameras. They do not work on the EF mount cameras, which include the full frame 5D Mark II.
Specifications
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The non-IS 18-55 measures 2.6 inches wide by 2.96 inches long, or 69 mm by 75.19 mm, and weighs 6.7 oz./190 g. The IS version measures 2.7 inches wide by 3.33 inches long, or 68.5 mm by 84.5 mm, and weighs 7.1 oz./200 g. Both versions take a 58 mm filter.
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References
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