双凸透镜（Double Convex （DCX）Lenses） 双凸透镜有两个曲率向外的表面，正焦距。 双凸透镜的两个表面都是球面的，通常具有相同的曲率半径，在物距和像距相等或接近相等的情况下，可以最大限度地减少像差，可用于1:1成像系统。 平凹透镜 ...

Check here the Kerala SSLC Physics Question Paper 2025 and Answer Key with PDF format. Get the exam paper with answers for ...

Photo: SmallRig Earlier today, Fujifilm announced the GFX100RF, a fixed-lens medium-format camera. There's plenty of ...

Fourteen generations of the Beretta family sold firearms. Here’s why the head of the 15th is moving beyond, adding bullets, ...

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

I recently checked out one of GameSir’s multiplatform controllers and found it rather good. Let’s not mince words, I thought ...

If you're searching for the best Leica M lens for your rangefinder, you have plenty of options to choose from. In this guide, I break down the entire lineup, highlighting the strengths of each lens ...

With the best lenses for iPhone and Android phones, you can gain a whole new perspective in your smartphone photography and videography. Smartphone camera arrays are undoubtedly improving, especially ...

Nikon’s Z-series lens line-up has never been healthier. If you’re shooting with one of the best Nikon cameras, you’ll want to pair it with the best glass you can buy. That’s exactly what ...

New quadrupole magnets for the High-Luminosity LHC will use Nb3Sn conductors for the first time in an accelerator.