Home News & Rumors Talk Canon patent details schematics for a possible RF 90mm F2.8L IS Macro...

Canon patent details schematics for a possible RF 90mm F2.8L IS Macro lens: Digital Photography Review

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A just lately revealed patent from Canon particulars a set of optical formulation for what seems to be an RF 90mm F2.8L IS Macro lens.

Japanese Patent Software Quantity 2018-205435, first detailed by Northlight Photographs, is pretty customary so far as patents go, however there may be one fascinating aspect price noting.

The picture stabilization parts contained in the lens — labelled L12 — are situated inside the first optical group in the direction of the entrance of the lens. Extra usually the picture stabilization part is in the direction of the middle of the lens, however that does not look like the case right here.

This may very well be for a lot of causes, however the patent textual content particularly mentions that as a way to get probably the most correct picture stabilization, bigger optical parts and accompanying motors are wanted. As such, the bigger entrance space of the lens makes extra sense than the center of the lens the place the optics are extra confined, particularly with the aperture mechanism situated there (represented by ‘SP’ within the illustrations).

It is also price noting that the focusing part of the lens is in the direction of the rear of the lens. The patent textual content says this too is because of the bigger focusing motor(s) wanted, however it may even have an additional benefit of making a extra balanced lens with the heavy picture stabilization part in the direction of the entrance of the lens. As Canon confirmed the world with its RF 35mm F1.eight IS STM lens, the RF mount makes it doable to place bigger parts and extra electronics in the direction of the rear of the lens because of the bigger mount measurement.

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