Telescopes are great tools for observing the heavens, or even surrounding landscapes if you have the right vantage point. You ...

Canon is rumored to be working on an ultra-wide, ultra-fast prime lens for its mirrorless cameras, potentially a 14mm f/1.4.

The NEET UG syllabus includes Physics, Chemistry and Biology (Botany and Zoology). Candidates can download the latest NEET ...

National Astronomical Observatories, Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing 100012, China Key Laboratory for Radio Astronomy, Chinese Academy of Sciences, Nanjing ...

There are some design variations including using a concave-shaped ... was in astronomical telescopes because the folded optical path enabled significant reductions in their physical size and weight.

and new tail lamps with concave lens for a cool ‘jet afterburner’ effect. While the roadster’s front grille now accommodates a radar sensor for the Mazda Radar Cruise Control (adaptive ...

Light is initially reflected off the primary mirror at the back of the lens onto the much smaller secondary mirror at the front of the lens and then refractive elements finish the job. There are some ...

\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

This expertly curated kit features the most popular 1.25" telescope eyepieces and filters, plus a 2x Barlow lens. The sturdy, foam-lined case has room to grow your collection. 5 SUPERIOR-GRADE ...

The space telescope's image of a odd-looking spiral galaxy is, in reality, two distant galaxies overlapping each other.

[Zach] over at his channel Breaking Taps has put up an extraordinary account on manufacturing some homemade acrylic lenses. In the end, not only does he produce some beautiful concave lenses ...