Focal length is the optical distance in millimeters between a camera lens and the sensor or film. It determines the height and width of the scene being captured, known as the "field of view." ...

Ever since I saw the Viltrox AF 135mm F1.8 LAB lens for Sony full-frame cameras I've been counting down the days until ...

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

A line of OEM-compatible CO2 laser lenses that feature a selection of focal lengths to let virtually all popular lasers become optimized for engraving signs has been introduced by Laser Research ...

1. A lens with the spectrum range expanded to NIR and covering a focal length range most commonly used at telephoto end: Extended spectrum coverage to NIR range coupled with the most commonly used ...

The D60x16.7 lenses are designed for a maximum sensor size of 1/1.8” and cover a focal length range of f = 16.7 ~ 1000 mm while the FH60x20 lenses offer a focal length range of f = 20 ~ 1200mm on 2/3” ...