Canon U.S.A. Inc., to Provide 120 EF 400mm f/2.8L IS II USM Lenses for Expansion of the Dragonfly Telephoto Array Project

Canon Rumors Guy

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Jul 20, 2010
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www.canonrumors.com
Canon USA continues to dabble in space projects along with Canon Inc.  Canon USA is sending Project Dragonfly 120 Canon RF 400mm f/2.8L IS II USM lenses. Project Dragonfly is an international research team consisting of Yale University and the University of Toronto researchers.


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About Project Dragonfly
The Dragonfly Telephoto Array is a novel telescope concept...

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neuroanatomist

I post too Much on Here!!
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Jul 21, 2010
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But I thought they were just gluing adapters to the old stock for the new stock. In a time of great supply constraint, they'd be giving away half their end-product's ingredients.
Perhaps...I have no idea if Canon is converting previously-made EF MkIII lenses to RF or simply producing RF versions de novo and this is a way to clean out existing stock. It's a bit more than just the adapter – the depth window is gone, and there are electronic improvements that go with the RF mount that may (or may not) require different chips/wiring on the inside, including the dual-power mode for faster AF that works with the RF lens on the R3 (but not with the adapted EF lens).
 
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Berowne

... they sparkle still the right Promethean fire.
Jun 7, 2014
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This is not new. Dragonfly Research dates back to 2014. In their first paper they reported the use of 8 400/2.8 canon lenses. So the "Giveaway" extended over nearly ten years. No need to be envious. :)
 

Kit.

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Apr 25, 2011
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I would have assumed that they aren't using autofocus but manually focusing 120 lenses would be a pain. Maybe they have a way to focus each electronically together as a group
Hopefully, the lenses need to be focused only once, at infinity. There is also no need in aperture control.

But yes, focus-by-wire of mark III would probably be a pain.