Most consumer point and shoot digital cameras say something like, "5x optical zoom," or "9x optical zoom" on the box. But, when you move up to micro-4/3s and SLRs, you lose that. It makes sense - the ...

The iPhone 6 and iPhone 6 Plus, are capable of taking superb photos straight out of the box and the fixed lens gives you great quality images in most situations. However, there’s only so much you can ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American The observable universe is one big, giant ...

The magnification (or power) you will see through a given optical system depends on the telescope and the eyepiece. The simple formula is: Magnification = Focal length of telescope ÷ focal length of ...

A newly discovered cluster-scale strong gravitational lens, with a rare alignment of seven background lensed galaxies, provides a unique opportunity to study cosmology. In a rare and extraordinary ...

KnowHOW team explains: A magnifying glass is a convex lens ? both its surfaces are curved outward. When light ray passes through such a lens, having arrived along a direction parallel to its axis, ...