In spite of my earlier semi-success with obtaining focus during daylight, at night it's still the same mess.

Leaving this focus untouched, I have pointed the scope vaguely at the direction of Mars. But all I get is this grainy indistinguishable mess. Tried playing with gain and exposure settings but to no avail. Every once in awhile I do so see some poorly focused "donut" crossing this screen indicating a poorly focused object but it moves quickly across the preview loop before I have a chance to try and focus it better. I can only surmise it represents an airplane. How do I finish focusing the scope at night and for what exposure?

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