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Camera lenses enhance the photos that the camera shoots. There are also lenses that makes picture finer and let more light in the photos that is why raw photos are more or less do not need editing.
Tamron makes many of them. Tamron makes the 17-55 2.8 for example.
There are a multitude of websites that sell camera lenses of all makes and models. If you're wanting to see a lens before purchasing, I would recommend a trip to a camera sales and repair store. Many have lenses in stock for purchase.
Cannon is sighted as being one of the best manufacturers of camera's and camera related items such as lenses. Nikon also makes a high quality lens system.
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All Canon Rebels can use either Canon EF (or compatible) or Canon EF-S lenses. EF lenses can be used on any Canon EOS camera. EF-S lenses, introduced in 2003, are made specifically for Canon EOS cameras with APS-C size (22.2 x 14.8mm) sensor. They can be used only on Canon Rebel cameras and on the Canon 20D, 30D, 40D, and 50D cameras (as of 2008). No other manufactuer currently makes camera bodies that take EF lenses. (Several years ago, Kodak had a full-frame digital camera that took EF lenses. It was a camera that was OK in the studio, but inferior for general photographic use. It was discontinued shortly after introduction.)
The question is incomprehensible. Do you mean are they made by the same maker? The answer to that question is yes. Nikon makes NikKor lenses.
Canon makes the best 50mm camera lens, known as the EF 50mm f/1.8mk2, 50mm f/1.4 USM and 50mm f/1.2L lenses
Some Olympus camera lenses fit other cameras and some only fit Olympus cameras. They have a number of lenses that fit the micro four-thirds mounting.
Sony cameras are very popular and is a reputable brand. Sony uses Zeiss lenses, unlike their competitors. Zeiss lenses offer great quality in the picture that is taken.
Canon makes the best 50mm camera lens, known as the EF 50mm f/1.8mk2, 50mm f/1.4 USM and 50mm f/1.2L lenses