objektívátmér

Objektívátmér refers to the diameter of the objective lens or mirror in an optical instrument, such as a telescope or microscope. This measurement is a critical factor in determining the instrument's light-gathering ability and resolution. A larger objective diameter allows the instrument to collect more light, which is essential for viewing faint objects or observing at high magnifications.

In telescopes, a larger objective diameter directly correlates to a brighter and more detailed image. For instance, a telescope with a 200mm objective diameter will gather significantly more light than one with a 50mm objective, making it capable of revealing fainter stars, nebulae, and galaxies. This increased light-gathering power also contributes to better contrast, allowing for clearer distinctions between celestial objects and their surroundings.

Similarly, in microscopes, the objective lens diameter influences the resolution, which is the ability to distinguish between two closely spaced points. A larger objective diameter, often associated with higher magnification objectives, generally provides better resolution, enabling the observation of finer details in specimens. The numerical aperture (NA) of a microscope objective is directly related to its diameter and focal length, and a higher NA leads to greater resolving power.

The term "objektívátmér" is therefore a fundamental specification for anyone selecting or using optical instruments, as it directly impacts the quality and capability of the observations that can be made. It is a key metric for comparing different instruments and understanding their potential performance.