https://www.engadget.com/2010-01-06-canons-eos-1d-mark-iv-gets-unboxed-high-iso-modes-tested.html
Canon's EOS-1D Mark IV gets unboxed, high ISO modes tested
Jan 6, 2010 - Wondering how Canon's high-ISO response to Nikon performs in the dark? We've got the answer. Photographer John Deeb got his early and was not only kind enough...
eos 1d mark iv
https://www.engadget.com/2010-02-22-canon-eos-1d-mark-iv-survives-marathon-33-page-review.html
Canon EOS-1D Mark IV survives marathon 33 page review
Feb 22, 2010 - Canon's EOS-1D Mark IV has been slinking around at retail availability for some time now, and while we brought you plenty of sample imagery from the camera...
canon eos 1d mark ivmarathon 33review