The latest patents from Sigma, Sony, Canon, Apple and Ricoh
→ Sigma filed a patent for a 400mm f/2.8 DG OS HSM lens.
→ Another Sigma patent: 24-105mm f/2.8-4 DG OS HSM Art lens.
→ Sony patented a tiltable attachment for lens style cameras.
→ Another curved sensor patent from Sony.
→ Sony patented a curved surface (multi-layer sensor) that corrects the angle in which light falls on the sensor.
Sony filed patent 2012-182194 for a curved image sensor that will improve the sharpness in the corners of the image. Nikon filed similar patent two years ago.
→ Sony has a patent for a LCD OLPF that can change a low pass filter by applying different voltages to the liquid crystal.
→ Sony filed a patent for a 28-75mm f/3.5-5.6 lens.
→ Konica Minolta filed a patents for a 18-56mm f/3.5-4.5 ASPH, 11-23mm f/3.5-4.5 and 55-135mm f/3.5-5.6 lenses designed for mirrorless APS-C camera.
→ Ricoh field a patent for a 16.4-500mm f/4-6.7 lens designed for a 1/2.3" sensor.
→ Canon's latest patent is for correcting vignetting by changing the exposure in different parts of the image based on the image height.
→ Another Canon lens patent: 24-600mm f/2-3 designed for 1″ sensor.
→ Apple field a patent for a 3-sensors iPhone camera with light splitting cube for accurate colors, improved low-light performance.