Photo: SmallRig Earlier today, Fujifilm announced the GFX100RF, a fixed-lens medium-format camera. There's plenty of ...

but the rear of the lens acts as an optically clear piston controlled by three piezoelectric actuators. The design is small, light, can produce plano-convex or plano-concave lenses, and can do so ...

Imagine capturing stunning widescreen visuals with sharp, dynamic focus, all while having the freedom to switch between manual and autofocus modes as your vision demands. This lens doesn’t just ...

The lens focuses ... and studying. Concave lenses correct myopia by being thin at the centre and thick at the edge. It diverges light rays entering the eye so they focus further back, landing ...

In both cases, rays of light do not focus on the retina so a clear image ... Short-sightedness can be corrected by placing a concave lens in front of the eye, as shown in the diagrams below.

the ray should pass through the principal focus. Draw a ray which passes from the object through the centre of the lens. Some ray diagrams may also show a third ray. Peep holes contain concave ...