Really do like that Lensball shot of yours..pg. 31
Thanks Lesley, have to round of the shots of that experiment and email to ya. As I said before 2 balls in line and tried to focus on each independently. Wasn't easy.
Those outside to round scales on that watch #1 looks suspiciously like a slide rule on in the round. Calculate what I mean
Thanks, Could be Larry. They represent what is called E6-B aviation calculator for determining info that is needed for flying purpose. Believe me the calculator is much EASIER than turning that bezel ring on watch to get answers!!