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by Christopher Witt · Posted
Humans’ fascination with the stars is as old as our ability to think and ask questions. For millennia we, as a species, were limited to observing the heavens with just our eyes. Of course, back then we were able to see more because light pollution didn’t exist, but making detailed observations was impossible. The invention of the microscope led to the development of the telescope, which allowed people to finally start exploring the larger universe. As technological advances were made and telescopes got bigger and better, their reach and the
by Allan Weitz · Posted
What is a lens?
Superficially, a lens is little more than a cylinder containing optical elements that shift about as you focus by turning a ring around the cylinder. But even in its most basic form, a camera lens is far more complex than it might appear.
A lens is more than the sum of its parts. When you attach a lens to a camera, your choice of lens is very much like a painter's choice of brush. For finer details, the painter will choose a narrow, pointier brush. For cloud-free skies, a broader brush would be a wiser choice. Wide-angle lenses