Quote:
Originally Posted by brian nordstrom
 That's how you do the final very small tweek on a Takahashi Mewlon . Use the 1st diffraction ring around the 'Aiery' disc.
Brian.
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Yep, then just to take it one step further, you can look at the corners of the chip when in focus and adjust the collimation according to the star shapes. If you do this enough, you get an idea of which knob to turn for a specific star movement.
Josh