Differences

This shows you the differences between two versions of the page.

--- public:kitt_peak:bok_90:90prime:focus [2019/09/04 16:38]
mel
+++ public:kitt_peak:bok_90:90prime:focus [2019/09/05 11:35] (current)
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@@ Line 25: / Line 25: @@
   - It will ask you how many rows to shift the CCD detector.  This will determine how big a gap between the stars there will be.  If you are far out of focus, you will need a larger number like 100.  If you are close 30 or 15 will do.  Again the previously used number of CCD row shifts is stored in the brackets.  If that is acceptable, just hit enter.
   - You will then have to wait until the script takes however many images you asked for.  It will reset the focus back to what it was originally when it's done.  You will see an image on Bart where stars will stack vertically either becoming larger donuts if you are moving away from focus, or smaller if you are moving towards focus.
+  - Once you do a sequence where you go through focus, you can do smaller steps around where you went through focus to find best focus.

MOON