Richard CanonNews / 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 4683 Tags: Patent ApplicationDIffractive OpticsDO Related articles Canon Patent for Consumer APS-C RF-S Primes Canon Researches a Crop Sensor 75-150mm F/4 Canon Patents a RF 24mm f/1.2L and a RF 35mm f/1.2L Canon Patent Application: Improved EVF Technology Patent Application: Full Frame Zoom Lenses Leave a comment Name: Please enter a name. Email: Please enter an email address. Please enter a valid email address. Comment: Please enter comment. I agree This form collects your name, email, IP address and content so that we can keep track of the comments placed on the website. For more info check our Privacy Policy and Terms Of Use where you will get more info on where, how and why we store your data. You must read and accept this rules. Add comment