![Permalink to The latest patents from Canon and Tamron](https://photorumors.com/wp-content/uploads/2022/06/Hasselblad-XCD-38mm-f2.5-lens-patent-4-120x120.jpg)
Canon 20-40mm F4 IS and 26-40mm F4.5-6.3 IS Patents Found Canon Power Zoom Patents: Canon 15-30mm F4-6.3 PZ, 20-50mm F4-5.6 PZ, and 12-30mm F4-6.3 PZ With Internal Zoom Canon Memory Card Cooling Patent Might Apply to Canon R1 and Canon R5 Mark II Tamron 50-200mm f/2.8 Patent Found