Tuesday, April 5, 2022
HomeCameraCanon Makes an attempt New Supertele Patents | Canon Rumors

Canon Makes an attempt New Supertele Patents | Canon Rumors

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A number of new catadioptric designs (generally known as “mirror” lenses) appeared in a patent utility to Japanese authorities, together with a 1200mm f/8 and an 800mm f/5.6.

First known as out in a put up on An Picture on a Sensor, the embodiments present typical “mirror lens” building, however with a larger-than-typical variety of lens teams and parts extending from the mirror optical tube, again towards the sensor.

This may increasingly indicate a a lot increased degree of aberration correction than is regular in the sort of lens. Most catadioptric lenses constructed for cameras are makes an attempt to get at massive focal lengths as cheaply as attainable, and the catadioptric design permits for extra gentle gathering with much less glass.

And so they usually have much less size, too. As a result of the mirror design causes the sunshine to double-back on itself a pair instances, these lenses are shorter than different forms of designs. The 800mm f/5.6 embodiment of this new patent utility, for instance, has a lens size of solely about 13 inches. Lenses usually add slightly little bit of size in precise manufacturing, however this 800mm lens would doubtless seem as an extremely-wide lens in regards to the size of the previous EF 70-200 f/2.8, with maybe an inch or two added.

Canon had a spread of mirror-based lenses beforehand.






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