Resolving power, also referred to as “resolution” or “angular resolution”, is a measure of a telescope’s ability to differentiate between two closely spaced objects. Knowing the resolving power of a telescope allows astronomers to understand the capabilities of its optics. The resolving power is defined by a combination of factors, including the diameter of the […]

Telescope aperture is the size of the primary optical element. Knowing the aperture of a telescope allows observers to understand the light-gathering ability and resolution. For amateur telescopes, apertures range from 50mm to 130mm in diameter. Knowing the aperture diameter size also allows telescope users to understand the focal ratio and focal length. These values […]

A telescope works by collecting and focusing light from distant objects. The objective gathers and bends light. The objective is either a lens, in refractor telescopes, or a mirror in reflector telescopes. Light is then focused into the eyepiece, which magnifies the image, enabling detailed observation of distant celestial bodies. Atmospheric conditions significantly impact the […]