https://community.usa.canon.com/t5/EF-RF-Lenses/Canon-EF-Extender-compatibility/m-p/419352#M26268 <P>Either version will work with your lens. The III has better image quality due to less distortion. The III has better AF performance with newer lenses; not the early 70-200.&nbsp;</P> Tue, 16 May 2023 16:29:49 GMT jrhoffman75 2023-05-16T16:29:49Z https://community.usa.canon.com/t5/EF-RF-Lenses/Canon-EF-Extender-compatibility/m-p/419340#M26266 <P>I've inherited a wonderful Canon EF 70-200 2.8 L lens. It is a Type I, I believe. I'd like to purchase a Canon EF Extender and was wondering if the Type II or Type III extenders would be compatible. I understand the mount will fit but I'm concerned about quality. I had read once that the extenders have to match the lens type. Thanks for any help you can provide.</P> Tue, 16 May 2023 15:19:16 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/Canon-EF-Extender-compatibility/m-p/419340#M26266 rpurdum 2023-05-16T15:19:16Z https://community.usa.canon.com/t5/EF-RF-Lenses/Canon-EF-Extender-compatibility/m-p/419352#M26268 <P>Either version will work with your lens. The III has better image quality due to less distortion. The III has better AF performance with newer lenses; not the early 70-200.&nbsp;</P> Tue, 16 May 2023 16:29:49 GMT https://community.usa.canon.com/t5/EF-RF-Lenses/Canon-EF-Extender-compatibility/m-p/419352#M26268 jrhoffman75 2023-05-16T16:29:49Z