From magnification to letting in enough light at night, here's how to choose the perfect monocular for stargazing and astronomy.

On a telescope, magnification can be calculated by dividing its objective lens's focal length by the eyepiece's focal length, both expressed in millimeters. For example, a telescope with an ...

The main body contains the zoom and magnification optics and the related ... Finally, there’s the huge objective lens, which [noq2] feels is the Achilles heel of the instrument.

discovered a way to get beyond the magnification ceiling. Instead of a concave lens near the eye, Kepler used a convex lens. The result was that the image magnified by the convex objective lens ...

Once you get past 10x magnification ... The second number, the one after the "x," refers to the objective diameter of the lens in the binoculars. This is the part of the tool that is responsible ...

When choosing a pair of binoculars for stargazing, we recommend models with objective lenses of at least ... For handheld stargazing, a magnification between 7x and 10x will give beautiful wide ...

With the ‘S’ indicating both binoculars are stabilized, Nikon takes on arch-rival Canon. But is such a feature worth paying ...

Having 8x42 after the name means these binoculars offer an 8x magnification, and have objective lenses 42mm in diameter. That’s pretty big for a pair of compact binoculars, so while these aren ...

The Fujifilm TS-L2040, with 20x magnification, will be $1,299.95 ... Other features of the new TS-L2040 and TS-L1640 include 40mm objective lenses on the front that allow more light in to boost ...

With 12x magnification and 50mm objective lenses, at first glance the Celestron Nature DX ED 12x50 is exactly the right size of binoculars to consider for both safari and stargazing. However ...