google him wrt 'angry photographer fraud' and see expose. He's banned from Nikon Rumours for trolling and sifting out new info that he swiftly reports as his own inside links etc. A recent video of a supposed leak of the D850 from Nikon Italy was merely a facile attempt to try and cover up broadcasting a NR press leak as his own. Some of his advice on classic Nikkor glass is indeed correct, but merely he parrots what many of us from that era already knew - eg 180 2.8, the 105 prime family (AI and AIS), micro-nikkors etc. And this includes the classic MF primes by Voigtlander and Zeiss.
And this lore is not only widely reported across the www, but was superbly summarized by Simon Stafford - cf The New Nikon Compendium. Lark Books, New York. Although last updated in 2004 and in dire need of revision, I rely on this book for all manner of int.
For more gleaning the nuggets of current info in all the puerile advertising, clickbait and snake oil of the Wilderness that is the Wild West (types digital) I have came to rely on the following sources. As a scientist, one gets used to be alert to snifff out that nanomole of BS, and much of the aforementioned rubbish sure reeks.
Central source = NikonGear for freely shared experience. It is amassed by doyens of Nikon and other glass and cameras; Start here -
http://www.naturfotograf.com/lens_surv.html#rating
The current threads active wrt the D850 speak volumes.
Thom Hogan especially ;
http://www.bythom.com/rationallenses.htm
Ming Thein's Blog (yes he now works for Hasselblad - all the better IMHO)
https://blog.mingthein.com/reviews/
this German site:
http://www.photozone.de/all-tests
equally Photography Life
https://photographylife.com/lenses/brand/nikon
for Wildlife and exotic telephotos etc there are some really good practical testers on the www. Notably
http://www.naturalart.ca/voice/blog.html#anchor_blog_archive
Brad Hill is testing the D850 in the Canadian backwoods.
Equally Steve Perry - I realised he's spot on with advice on configuring the D500, especially the AF for BIF etc. His 2 books are really well worth getting
https://backcountrygallery.com/
Be interesting to read the reportback from both these blogs as to the real-world performance of the D850
kind regards