You can have the best camera for beginners, but if you don't truly understand focal length, you'll struggle to pick the right ...

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." ...

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 ...

Make: Fujinon Model code: DV3.4x3.8SA-1 Zoom type: Manual Lens Format inches: 1/2 inch Focal Length mm: 3.8 ~ 13 mm focal length ...

Tamron Co., Ltd., specialised manufacturer of optics and one of the leading companies in the security / surveillance equipment industry announces the launch of a Vari-Focal lens 1/3” 5-50mm F/1.6 ...