To reduce distortions such as elongations and blurriness caused by the curvature of the "objective" lens—the convex lens at the far end of the telescope—Galileo ground a lens larger than he ...

For birders, the best spotting scope can make all the difference, allowing you to observe and identify distant birds with clarity and precision. The Gosky 20-60X80 HD Dual Focusing Spotting Scope is ...

Design: Roof prism Magnification: 5x Objective lens: 15 mm Eye relief: 15.8 mm Weight: 2.6 ounces / 75 g Dimensions: 2.8 x 1.2 x 1.2 inches (7.1 x 3 x 3 cm) The Nikon 5x15 HG Monocular has a 9 ...

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 decent magnification coupled with large-ish objective lens and fully multi-coated optics – to enhance brightness throughout the light transmission process – ensures they deliver a ...