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Message: <blockquote data-quote="J-see" data-source="post: 394133" data-attributes="member: 31330">If you want a wide angle it is going to provide you the 10mm to 18mm range depending which you get. You can go shorter but that's often Fisheye territory.What it enables you to do is take wide shots which can be nice for landscapes and architecture although they don't come without restrictions. You need to know where to take the shot and how to point the lens. There's quite some distortion in the short range but most of that can be fixed afterwards.The advantage is just that; wide. You have a much wider field of view which can be handy. But they're fairly costly depending what you buy and how much you'll use them.If you're not sure if you need one, you probably don't.</blockquote>