Specification and lens arrangement of embodiment 1 Focal length: 41.1947 mm F no: 2.0834 ω : 27.4433 Image height: 21.63 mm Specification and lens arrangement of embodiment 2 Focal length: 87.3068 mm F no: 2.0602 ω : 13.6158 Image height: 21.63 mm Specification and lens arrangement of embodiment 3 Focal length: 25.5053 mm F no: … Continue reading Tamron 25mm, 40mm and 85mm f/2.0 Full Frame Patents Found