Lens Adaptor

Can anyone help with these problems of the camera.?

Ok, so my questions are: 1. What is the Canon lens hood do. 2. What dose DC58E lens adapter for cannon. And what would all these costs, and thanks for your time and assistance.

1) is used a parasol to shade the front of the lens from sunlight. This helps to control the appearance and increase contrast. It is useful when the sun is just outside the picture but still was shining on the lens. 2) The adapter DC58E Canon S5 IS, S3 IS & S2 IS Digital Cameras, which allows the mounting of the filters, auxiliary lenses of wide angle and close-up lenses, and visors Sun

4. Canon 7D Nikon lens adaptor – Interactive tutorial

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