Pat
How did your HD-B'S do at 11,000' when it came to baro pressure? My Leica 1600B ' s would not give me baro several years back when I was at 11,200'.
Alan
The "dope" was spot on....there was a couple inches of fresh snow, and the temp was 30*F. They worked well in the snow and bright sunshine too. Angle compensation was perfect as well..
The HD-B's are a completely different animal compared to the Geovids....much better laser, and better optics to my eyes anyway.