Three interesting lens patent applications were just published. The first one 20110109974 is for a 10mm f/4 full frame lens: Example 1 is for a 17 mm f/4. Interestingly the image height is 33mm. This makes sense for a tilt-shift with +-12 mm of shift: F0 = 17.11 FNO = 4.08 .omega. = 63.03.degree. Y = […]
Nikon filed a patent in Japan for a full frame 55-300mm f/2.8-4 lens:
Back in November Nikon filed patents for 24mm f/2.8 and f/3.5 full frame lenses. Few weeks ago, a new patent 201159288 was filed in Japan for a 24mm APS-C lens: Two different versions of this lens were described in the patent – one with f/2.0:
It’s Friday – time for another Nikon patents update. First, a new patent application for a 10mm f/2 wide angle lens with a 155° angle of view: Next patent application 20110080659 is for a 18mm f/2.8 DX format (28mm equivalent). This lens is not designed for F-mount (back focus is 19mm) and is compact (58mm from image plane to front element) – […]
Few weeks ago I reported on a Nikon patent about a light meter built into the prism. Nikon has filed a series of related patents. One of them is 7876373 which describes a camera with a hybrid viewfinder: “One of the objects of the present invention is to provide a means capable of confirming the state of field and the […]
Patent 2010-224290 is for a light meter built into the prism (for use during video recording?): “This invention relates to the camera which has a photometry sensor which measures the strength of the light with the light led to the optical finder and the optical finder. Problem to be solved: to make effective use of a […]
Time for another Nikon patents update. The first patent 2011-28177 is for a Nikon’s own “half mirror” with a mirror-up function: This technology is similar to Sony’s translucent mirror. Here is a quick comparison between both technologies:
