Choosing a telephoto lens usually means choosing between size, cost, and autofocus capability. The Kase 150mm f/5.6 autofocus mirror lens is trying to hit all three at once, and that's not something ...

Canon has designed a pair of RF-mount catadioptric telephoto lenses that it says successfully corrects for field curvature while still being small, lightweight, and have a large aperture: a 300mm ...

LEWISVILLE, Texas, July 16, 2025 /PRNewswire/ -- Ophthalmic lens technology leader HOYA Vision Care announced today the launch of HOYA Polarized Lenses with Lumacore™ Mirrors. The patented technology ...

They work by using internal mirrors in the lens to allow for a longer focal length by bending the light rays back on themselves several times before they are sent to the sensor. Typically, these ...