I have just published episode 115 of my Wild Nature Photography Podcast. In this episode, we welcome our first podcast guest and talk with photographer Kevin Hall about his recent experiences photographing Arctic Foxes in the Hornstrandir Nature Reserve during our back-to-back workshops in Northern Iceland. Kevin shares his insights on his experience and his thoughts on the new Canon EOS R1 in an all-things-photography discussion.
www.WILDNATUREPHOTOTRAVEL.com 
I had to look into some of those lenses you mention (like that Nikon 400 w/ built in TC). I would hope that is nice for US$13,000!
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