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The Powell lens is a specialized optical component designed to convert a Gaussian beam into a uniform flat-top beam, ideal for various applications in laser ...

With a zoom lens, when you turn on macro mode and move as close as possible while still keeping the subject in focus, the minimum distance to the subject and the size of the subject in the frame will differ depending on whether the lens is at a wide-angle or telephoto zoom position. With a wide-angle setting you may be too close and with a telephoto setting you may be too far away so adjust the focal length to find the one that makes it easiest to take the shots you want.

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Optical tables provide a stable and vibration-isolated platform for mounting optical setups. They feature a regular array of threads, available in metric or ...

Diyscope mirror

The angle indicating the width of the field included in the photo is called the "angle of view." A wide-angle lens has a wide angle of view and a telephoto lens has a narrow angle of view.

* The GXR interchangeable unit camera system has camera units with a fixed focal length lens and camera units with a zoom lens.

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The distance from the center of the lens to the image focal point (=image sensor surface) is known as the focal length. It is expressed in millimeter (mm) units. A lens with a short focal length is a wide-angle lens and one with a long focal length is a telephoto lens.

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Concave mirrors are used in light collection applications or as focusing mirrors in imaging systems. Newport's concave metallic-coated mirrors on ...

Bestscope mirror

This is a lens used for close-up photography. A macro lens can shoot from a distance closer to the subject than a regular lens. The GXR interchangeable unit camera system has a camera unit with a 50 mm macro lens. Link to more information on GXR camera unit

Ocular lenses are also called the eyepiece. This contains a system of lenses that magnify further the image formed by the objective lenses and projects it ...

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... lens was used by the Cordouan Lighthouse in 1823. Fresnel Lenses are made of many small pieces of glass, each different thicknesses. These pieces of glass ...

Attaching a 0.75x wide conversion lens to a 28 mm lens gives an angle of view equivalent to a 21 mm ultra wide-angle lens.

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by AP Ribeiro · 2021 · Cited by 20 — In this study, sugarcane plants constitutively overexpressing the Sorghum bicolor MATE gene (SbMATE) showed improved tolerance to Al when ...

A conversion lens is attached to a lens to enable it to take photos with a wider angle or stronger telephoto magnification.

Even if the focal lengths of the lenses of two digital cameras are the same, the angle of view can vary depending on the size of the image sensor used in each. To make it easier to understand angle of view, focal length is often expressed as "__ mm equivalent," which means it has been converted to the 35 mm film camera format that has been historically the most common. Here on this site also, we state focal lengths that are converted into 35 mm film camera format.

Attaching a 1.88x teleconversion lens to a 72 mm lens gives an angle of view equivalent to a 135 mm medium telephoto lens.