Stock Notice: Canon RF 600mm f/4L IS & Canon RF 400mm f/2.8L IS

neuroanatomist

I post too Much on Here!!
CR Pro
Jul 21, 2010
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As the lenses seems to be no other than EF with an included internal adapter there should be no problem with a lens too close at the back. The first 2cm should be totally empty.
Or am I wrong?
They are compatible, without issue. The confusion probably comes from the fact that on the RF extender pages on the Canon USA store page, the Compatibility section lists only the RF 100-500, 600/11 and 800/11.

F0385206-E757-4752-B100-044589EDE368.jpeg

On the main product page, the RF 400/2.8 and 600/4 are included on the list.

Since this is a thread on lens availability, I’ll point out (again) that the Canon product pages and the Canon store pages do not seem to be in sync. With many hard-to-find RF lenses, they show as in stock on the product page but when you go to the store and add them to your cart, they show as backordered.
 

usern4cr

R5
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Sep 2, 2018
1,262
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It's worse than that - describing f/8 and f/7.1 as unusably slow is as dopey a remark as I have ever seen here.
I agree! I wrote my initial reply quite scathingly at the stupidity/trolling of the original poster, but I'm trying to be more "relaxed & polite" in my posts and thus I rewrote it in a "considerate tone" but one that got the point across that they'd be better off in Sony's website instead of unfairly trolling this one.
 
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AlanF

Stay at home
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Aug 16, 2012
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I agree! I wrote my initial reply quite scathingly at the stupidity/trolling of the original poster, but I'm trying to be more "relaxed & polite" in my posts and thus I rewrote it in a "considerate tone" but one that got the point across that they'd be better off in Sony's website instead of unfairly trolling this one.
I try to be polite always. But, describing the Sony 200-600 mm f/6.3 lens as being "perfect" combination of speed etc and then the 100-500mm f/7.1 as being unusably slow was just too much, with just a 1/3rd of a stop from 6.3 to 7.1 somehow causing a catastrophic change in usability.
 
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eosuser1234

EOS 90D
Jul 16, 2013
165
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Japan.
The truth is the big whites are usually paid for by media companies, lens rental firms, etc. Those of us whom are married get stuck with F11.
 
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