The most commonly used and the earliest example of an achromatic lens is the achromatic doublet. An achromatic doublet is made from a pair of glasses, of which one is typically a concave and another ...

Made from transparent materials, such as glass or plastic, lenses can either converge (convex) or diverge (concave) light rays to create real ... low distortion and low vignetting. IDS is another ...

For example, the average shapes of the cells in Cluster-2, -4, and -6 were rod-like, with different widths or lengths. Cells were fattest in Cluster-4. Cells in Cluster-1, -3, and -5 were elongated ...

This relaxing video provides a behind-the-scenes look at Sigma's factory in Japan, showing the full assembly process of its 70-200mm lens.

They support both concave and convex lenses suitable for near-sightedness and far-sightedness respectively, with powers ranging from -8 D (dioptre) to +6 D.

YouTuber Jack Joy, AKA Graindead has a question: does anyone have a manual for the 3DS-EXP 645, made by Sakai Special Camera?

Example: Canon EF 35mm F2 IS USM EF-S lenses are made for APS-C SLRs and do not work with full-frame models. Like EF, EF-S lenses are no longer being developed but can be found in shops.

Glasses themselves are fashion statements. Even Babyface rocks glasses frequently at red-carpet events. Without the visible ...

Nasha is a Managing Editor for CNET, overseeing our sleep and wellness verticals. She is a nutrition, mental health, fitness and sleep science enthusiast. Her passion for mindful and holistic ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio ...

Now that we have Circle to Search, Google Lens has been updated so that it immediately starts the camera viewfinder upon launch on Android and iOS. Previously, tapping the Google Lens shortcut in ...