A patent showing ultra wide angle optical formulas for APS-C mirrorless cameras has appeared. Optical Formulas: 18-45mm f/3.5-5.6 IS 9-18mm f/4-5.6 IS 11-30mm f/3.5-5.6 IS 10-20mm f/4-5.6 IS Canon News notes that the lens element designs look like they could be collapsible.
canonrumors.com
Canon is clearly working on new ultra wide zoom lenses to add to the lineup, we have yesterdays patent showing a EF 17-35mm f/4-5. 6 IS STM and today we see a patent application that covers 6 different ultra wide angle zoom optical formulas for APS-C sensors. canonrumors.com »
2017-12-27 22:01
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This patent application (Japan 2023-125903) has a lot of esoteric fast zoom lenses in some very nontraditional focal lengths. Many of the embodiments are missing the image height, however since we also have the half angle of view, we can work backward to verify if these lenses are meant for full frame or for APS-C.
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