[PRejto (Peter)]

Originally Posted by Merlin66

Peter,
In the CCDCalc sheet you didn't include the barlow...
Notwithstanding, at least in theory your comparable plate scale v's guiding should hold.
As Marc says, it comes down to seeing conditions, telescope balance and luck!

Hi Ken,

I did not include the barlow because the barlow is placed after the beam splitter...thus, the guide camera does not see the barlow at all.

Thanks for the plate scale confirmation. The "luck" part I want to avoid by knowing exactly what I'm doing. But, I'll take good luck with seeing!!

Peter