Achromatic lenses and semi-plan lenses are used to improve the alignment of colors at the focal point in order to provide a clearer image. They differ in terms of glass type, cost, and index of ...

Objective Lens Objective lenses collect light and focus it ... Semi-Plan Semi-plan objectives provide 80% flat-field correction. They can consist of either two achromatic lenses or three apochromat ...

An achromatic cylindrical lens is composed of a positive low refractive index cylindrical lens and negative high refractive index cylindrical lens cemented together, which can significantly reduce ...

What we got was a lineup of 15 spotters in a wide range of magnification, objective lenses, sizes, and purposes. Our plan? To ...

To reduce distortions such as elongations and blurriness caused by the curvature of the "objective" lens—the convex lens at the far end of the telescope—Galileo ground a lens larger than he ...

The best binoculars for stargazing need high magnification and large, light-hungry objective lenses — check out our favorites ahead of Amazon Prime Big Deal Days. Ideally, the best binoculars ...

Select the lowest power objective lens. Turn the coarse focus knob slowly until you are able to see the cells. Turn the fine focus knob slowly until the cells are in focus and you can see them ...

The best iPhone lenses are a sure fire way to take your iPhone photography up a level. Sure, the iPhone 15 Pro has a 48MP sensor, which sounds great on paper, right? Well, ask any professional ...

One tweak recently made to the desktop browser is the addition of a Google Lens button that pops up every time you click inside the address bar. According to Google, this shortcut is intended to ...

Corrections & Clarifications: A previous version of this story described a directional functionality as a Lens feature, but it is not part of that suite of products from Google. NEW YORK ...