This makes it capable not just of swift subject acquisition when shooting still images but also seamless subject tracking when shooting videos, therefore ensuring that viewers don’t feel uneasy when watching the video playback. ![]() The Nano USM (Ultrasonic Motor) is characterised by its capacity to perform both quick and precise movements, which are unique to a linear ultrasonic motor. The electronic floating focus system also helps to reduce focus breathing, which causes the angle of view to change during focusing. This enables the RF100mm f/2.8L Macro IS USM to balance improved functionalities such as a shorter closest focusing distance and spherical aberration control alongside core performance qualities such fast, high-precision AF. On the RF100mm f/2.8L Macro IS USM, the autofocus (AF) is driven by two independent Nano USMs that make possible an electronic floating focus control system where the focusing lens group and the floating lens groups are controlled separately. The electronic floating focus control system: Achieving more than just fast, accurate AF As of 13 April 2021, according to a Canon survey. ![]() * Of all AF interchangeable lens for full-frame mirrorless cameras. The resulting changes to the design and AF drive dynamics of the focus and floating lens groups made it possible to carry out fast, precise focusing from nearer than before. How did Canon manage to achieve the world’s first* 100mm macro lens capable of up to 1.4x magnification? The answer lies in the characteristics of the RF mount, namely, the large mount diameter and short back focus distance, which allowed more flexibility in optical design. This achieves a larger maximum magnification of up to 1.4x-more than life size-even while retaining the same focal length. On the RF100mm f/2.8L Macro IS USM, this closest focusing distance is 26cm, shorter than the 30cm on the EF100mm f/2.8L Macro IS USM. However, on all lenses, there is a closest focusing distance, i.e., a limit on how close you can be before the lens becomes unable to focus. To capture close-ups of a subject so that it fills more of the frame, your first instinct would be to move closer to it. Macro lenses in this class usually have a maximum magnification of 1x (life size), which means that a subject that is 1cm long will be depicted as 1cm on the image sensor. The RF100mm f/2.8L Macro IS USM is a 100mm medium telephoto macro lens. World’s first lens in its class* to achieve 1.4x magnification - Compatible with new ring-type mount for better stability.- Hybrid IS: Image stabilisation optimised for macro shooting.- SA control ring: Adjust the visual appearance of bokeh.- Electronic floating focus system: Reduced focus breathing and more!. ![]() - Closest focusing distance, 1.4x magnification.Read on to learn more about this new red-line (L-series) medium telephoto macro lens that realises both excellent image quality and unprecedented functionality. The lens design harnesses the flexibility afforded by the RF mount’s large mount diameter and short back focus distance to achieve new possibilities, such as a maximum magnification of 1.4x and a Spherical Aberration (SA) control ring that allows users to achieve soft focus effects. On 14 April 2021, Canon announced the RF100mm f/2.8L Macro IS USM, its first true macro lens for the RF mount.
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