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 ...

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 ...

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

Repeat steps 1-5 using the higher power magnification to see the cells in more detail. To see an object, the eye piece lens and the objective lens magnification are multiplied together to give the ...

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 ...

Its 12x magnification offers the potential for ... featuring high-level glass treatments and a large 52mm objective lens. These specifications result in a remarkable light transfer of 91% ...

Opt for models with objective lenses of 40-50mm or larger to gather ample light, which improves the visibility of stars, planets, and some deep-sky objects. Magnification between 7x and 10x is ...

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 ...

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 ...

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 ...