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Esteemed Contributor
Posts: 2,909
Registered: ‎02-17-2016

400mm F/2.8 teardown at Lens rentals

Since the last link did *not* get excised:

https://www.lensrentals.com/blog/2018/12/the-great-400mm-f2-8-teardown-competition-part-1-the-canon-...

 

It uses the same focus motor as the R-Series 50mm / 1.2!

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Esteemed Contributor
Posts: 2,313
Registered: ‎11-14-2012

Re: 400mm F/2.8 teardown at Lens rentals

Thanks. Passing the link onto a friend who has one on pre order that shipped today.

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