Here, choosing the right lens is crucial – it should give you wide zoom options to react quickly and accurately," says Mark. "I have been working with a focal length range of 150-600mm for a while now ...

Choosing the right focal length is a crucial part of the creative decision making process for a photographer. You can have the best camera for beginners, but if you don't truly understand focal ...

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 ...

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

Fujifilm just announced its latest medium format camera, the GFX100RF. This one differs from the company’s other GFX models ...