This link could help you:
You don't want to see a tiny image of distant objects right? I guess that's why it's magnified...
As an object gets further away less of its light will reach your eye. The image takes up less space on your retina (the light-sensitive tissue at the back of your eye), making the image smaller. This makes details of the image harder to see.
To make a distant object appear brighter and larger, we effectively need a bigger eye to collect more light. With more light we can create a brighter image, we can then magnify the image so that it takes up more space on our retina.
The big lens in the telescope (objective lens) collects much more light than your eye can from a distant object and focuses the light to a point (the focal point) inside the telescope.
A smaller lens (eyepiece lens) takes the bright light from the focal point and magnifies it so that it uses more of your retina.
A telescope's ability to collect light depends on the size of the objective lens, which is used to gather and focus light from a narrow region of sky.
The eye piece magnifies the light collected by the objective lens, like a magnifying glass magnifies words on a page. But the performance of a telescope depends almost entirely on the size of the objective lens, sometimes called the aperture.