Not that I am into planetary or lunar imaging, but wouldn't the limiting factor be the light gathering ability of your scope at this speed. 1/170 s exposure is very short.
Peter,
The fast frame rate "freezes" the seeing, and by stacking up to a 1000 frames you can build up a good, lo noise image.
Programs like Registax and Autostakker were designed just to solve this problem.
Not that I am into planetary or lunar imaging, but wouldn't the limiting factor be the light gathering ability of your scope at this speed. 1/170 s exposure is very short.