In the mid seventies, whilst rummaging through a tea chest in a junk shop in Paddington, London, I discovered the original film prop HAL 9000 lens faceplate and the key to HAL's main processor room.

The ELM-9000 A offers the utmost in flexibility by accurately measuring all lens types— including progressives, which are automatically detected. There also is no need to adjust the ABBE number ...

Abstract: This paper presents a measurement system based on the transmission fringe deflectometry, which is designed to facilitate the rapid attainment of the free-form lens optical parameters, ...

Our lens reviews offer detailed information on sharpness, distortion, bokeh, and all the other important factors that go into making a lens great. Our reviews give you all the information you need ...

Adjusting the back focus shim stack on anamorphic lenses will adversely affect the optical performance and introduce astigmatism to the lens. Laowa Proteus What I like about the Laowa Proteus series ...

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Targeting enemy ships, bouncing war data off of drones, detecting incoming ballistic missiles, seeing small attack boats over the horizon, and intercepting anti-ship missiles are all crucial ...

Join me as I pick the best lenses for astrophotography fans shooting a starry night sky, to suit a range of cameras and budgets. I think that the best lenses for astrophotography are vital for getting ...