Richard / Thursday, February 21, 2019 / Categories: Canon Patents Canon Patent Application: More diffractive optics super telephotos Canon it seems is not quite done with researching diffractive optic patents, even though the 600/4 DO that we saw on prototype is starting to seem like a unicorn.This is a new patent application with the entire range of super telephotos from 400, 600 and 800mm listed as embodiments.Focal distance 582.00F number 4.12Half field angle (degree) 2.13Image height 21.64Whole length of the lens 394.25BF 62.79Focal distance 405.00F number 4.12Half field angle (degree) 3.06Image height 21.64Whole length of the lens 330.16BF 50.46Focal distance 795.00F number 5.60Half field angle (degree) 1.56Image height 21.64Whole length of the lens 490.24BF 105.13Japan Patent Application 2019-028317 Previous Article Deal: Save up to $990 on HP Zbooks Next Article Canon Patent Application: APS-C mirrorless kit lenses Print 3660 Tags: Patent ApplicationDIffractive OpticsDO Related articles Patent Application: Canon RF-S14-30mm F4-6.3 IS STM PZ Canon Patent: Quarter Wave Element Lenses Canon Patent: Esoteric Optical Designs Canon Patent: 17-70 and 16-60mm F2.8 Zooms Canon Patent Application: More Fast RF VCM Primes Please login or register to post comments.