In my post on seeing and r0 (Fried's parameter), there was a mistake in the FHWM calculation at 850nm versus 550nm, it should have been:
(850/550)^(6/5)=1.69
r0 scales as 6/5th power of lambda, I used 5/6 instead, sorry for that, I am getting tired
As you can see the improvement is almost 70% on seeing using NIR versus visible wavelengths.
With Dr. Mario Motta we did an experiment few years ago to test how much we could improve guiding in poor seeing conditions using NIR.
Here is a link to Dr. Mario Motta's toy, a monster 32" f/6 relay telescope equipped with an ONAG XT and an AO-L (SBIG).
http://bostoniano.info/italiani/mari...pe-gloucester/
The result is shown at the bottom of this page:
http://innovationsforesight.com/NIRGuiding.htm