Where's the post or e-mail where he said that, RD ? The book, "Optics for the Hunter" does say just that, page 43-45. In the book, he doesn't specify 140 degree water or 5 mins. That I've seen him state in other articles or posts.
Odviously you've never hunted or shot in really warm temps if you think a scope would never warm to 140 degrees. Try putting your hand on a black scope on a day when it's been in full sun for a while and the air temperture, in the shade, is over 105. E
