Binoculars have three main parts: the objective lens, prisms and the ocular lens. Binocular lenses are thicker in the middle and taper out to a thinner edge, which bends light toward the middle. These ...
You’ll struggle to find a more affordable pair of roof prism binoculars for viewing the night sky with the Celestron UpClose G2 10x50’s 10x magnification and 50mm objective lenses. They’re the perfect ...
Over on YouTube [Applied Science] shows us how to make an f/0.38 camera lens using an oil immersion microscope objective. The f-number of a lens indicates how well it will perform in low-light. To ...
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