Quote:
Originally Posted by Peter Ward
Indeed I'd suspect you be chasing your tail if collimation had to be done as well.
By the way... real world result is here
I've also found that when you get down to these levels that, not just the star field used with CCD inspector, but also differing exposures of the same field show small tilt variations. |
That's right, and that's also why large aperture AO is limited in it's use. The isoplanatic patch (the area of the sky that has undergone the same atmospheric aberration) at most sites is pretty small, so large chips pickup focus differences from top-left to bottom-right etc. pretty easily (the atmosphere moves the star around on your chip AND causes defocus at the same time)
Best,
EB