In photographic catadioptric lenses, the secondary mirror – which has a convex surface – also serves to increase ... Of course, while the magnification power of a mirror tele at a particular focal ...

Fujifilm was one of the first camera makers to embrace mirrorless systems and has one of the most well-established lens libraries. These are the best we've tested. Images, and the devices that ...

This valuable study builds on previous work by the authors by presenting a potentially key method for correcting optical aberrations in GRIN lens-based microendoscopes ... refer to the magnification ...

If you're looking for the best telephoto lenses for your camera, look no further. I've drawn on experience of testing and reviewing lenses to bring you this indispensable guide to the most capable ...

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