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Canon Information has uncovered a brand new optical system patent for a Canon RF 28-70mm f/2.8. Canon appears to have labored fairly exhausting at decreasing the scale of such a design considerably. The design on this patent is definitely smaller than the highly-regarded Tamron 28-75mm f/2.8 Di III RXD for the Sony E mount.
Canon has a few lenses already masking this focal size, such because the RF 28-70mm f/2L and the RF 24-70mm f/2.8L IS, however as we noticed with the EF mount, the EF 24-70mm f/4L IS was fairly a preferred choice for those that didn’t need the scale, expense or velocity of the EF 24-70mm f/2.8L II.
With the EF 24-70mm f/4L IS being discontinued, there’s seemingly a necessity for a smaller 24-70 kind lens for the RF mount. The lens design on this patent is barely about 1cm longer than the EF EF 24-70mm f/4L IS, however has the bonus of getting an additional cease of sunshine. Might this be a cheaper non-L zoom?
Japan Patent Utility 2021-156963
Focal size: 28.84mm 37.17mm 67.90mm
F quantity: 2.91 2.91 2.91
Half angle of view: 32.65° 28.90° 17.67°
Picture peak: 21.64mm 21.64mm 21.64mm
Whole lens size: 122.81mm 111.18mm 132.62mm
BF: 21.92mm 26.79mm 39.84mm