Patent: More Supertelephoto Optical Formulas

Last updated: May 6, 2025 1:35 am

Craig

Published: February 5, 2018

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Another set of Supertelephotos has appeared in a Japanese patent application.

Japan Patent Application 2018-018101

EF 300mm f/2.8L
EF 400mm f/2.8L
EF 500mm f/4.0L
EF 600mm f/4.0L
EF 800mm f/5.6L

We're expecting new supertelephoto lenses some time in the next 12-18 months.

TAGGED:ef 300 f/2.8L IS II EF 400 f/2.8L IS II EF 500 f/4L IS II EF 600 f/4L IS II EF 800 f/5.6L IS patent

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Craig is the founder and editorial director for Canon Rumors. He has been writing about all things Canon for more than 17 years. When he's not writing, you can find him shooting professional basketball and travelling the world looking for the next wildlife adventure. The Canon EOS R1 is his camera of choice.