I picked up a benchtop injection molding machine to play with, and thought a "simple" double convex singlet lens would be a good first project. Ukraine repels Russian air attack with French Mirage ...

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

Whether you're photographing pickup ball games or shooting pro racing at the speedway, the principles of what makes a good lens are the same – so this guide should prove handy for sports shooters of ...

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Any serious photographer should have a 50mm lens in their kit bag. Also known as a 'standard' prime or a 'nifty fifty,' these lenses capture a perspective that's roughly equivalent to the field of ...

This is the Fall’20 course homepage for EEOR E4650: Convex Optimization for Electrical Engineering. Note: The official name for the course is “Convex optimization for electrical engineering”. However, ...

A metalens is a flat lens composed of nanoscale structures capable of controlling light diffraction, which can drastically reduce size and thickness compared to traditional convex optical lenses.

Sigma has announced the 300-600mm F4 DG OS Sports lens, designed specifically for applications like sports, action and wildlife photography. Recent Videos Optically, the lens is built around 28 ...

On Wednesday night, a ruling came down from the Minnesota Supreme Court on the definition of a public place. The ruling is in connection with a 2022 case against a man accused of carrying a BB gun ...

We have seen ways to minimize the work involved to get a usable lens, but when it comes right down to it the printing process creates tiny (but inevitable) surface imperfections that have to be ...