Can I make magnifying glass in unity3d?

I am creating an App in that one module is I providing one button if user click over button
one rectangular box move as per mouse position and show the object big in size when this rectangular box come near that object.

Use a second Camera. Set the camera’s viewport to the screen area of the rectangular box. You can either move the camera closer to the target or change the field of view.

To move the camera, read the mouse’s axes in Update(). Then update the viewport and the camera position according to the mouse position.