I recently bought an Esprit 100ED (yay!), and I'm wondering about focusing solutions. My other scope is the EdgeHD, and the Bahtinov mask works fantastically. Unfortunately, I don't see a Bahtinov for the 100ED. Is there a focusing method used to ensure optimum results?
I have the ASIAir Pro that also seems to have a focusing tool, but I haven't tried it. Is targeting the lowest possible HFD value a realistic method for achieving focus?