400mm F/2.8 teardown at Lens rentals

[kvbarkley]

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!

[cicopo]

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