I'm hoping to be able to measure binary stars, via "Video Lucky Imaging" with my not-arrived-yet 20" Dob.
The mount is an Alt-Az so the main problem I foresee is calibrating the camera frame's angle with the sky. Field rotation from pointing here and there in the sky will mean that I will have to calibrate for PA before every video.
Here is a possible workflow for acquiring the imagery: Using a Canon 60Da DSLR and Backyard EOS....
1. Slew to target pair. Centre. Tracking ON.
2. Place pair near East edge of the field.
3. Tracking OFF and open shutter to record a drift line across the frame.
4. Tracking ON, re-centre the pair.
5. Acquire 30 seconds of video
6. Repeat steps 2 and 3. The mean of the two drift lines will be the 'actual' drift line and be incorporated in the calculation of the actual PA.
Repeat 1-6 for each successive pair...
What am I missing?