You searched for "objective diameter"

Vortex Kaibab 18x56 HD binoculars review

Wednesday, November 13, 2024 by Piergiovanni Salimbeni

In recent months, I have noticed a growing interest in binoculars with magnifications greater than 15x, but still easily portable anywhere. For this reason, I asked the official distributor of Vortex products, Origin STB , to send me a sample of the  Vortex Kaibab HD 18×56,...

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Telescope light gathering power and resolution

Tuesday, October 15, 2024 by Leon Palmer

Exploring two key properties of telescopes: light-gathering power and resolution. These attributes, determined by the objective's diameter, affect how faint objects can be seen and how well close stars can be resolved. With a focus on practical examples, such as comparing the human eye to an 8-i...

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