Content Comparison

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1. Adjust focus to be ideal.
   1. We arrived at 2154.2 with a FWHM in SharpCap as 4.7 on 432 in b1
2. We will use the “Smart Histogram brain” tool to determine optimal gain settings for the field :  (see below for instructions)  (https://docs.sharpcap.co.uk/4.0/#Smart%20Histogram.  You will run this once for each filter.First measure ) 
   1. Note that we needed to restart sharpcap after putting the sensor analysis files in place (see abvoe)
   2. Tools > Histogram (with sensor analysis files in place)
   3. BRAIN appears. Click it.
   4. We want to measure sky background
      1. Check Ignore Image edges/corners (we have vignetting problems)
      2. Click "Measure"
      3. Measure the sky background and note this down (with filter ID).
   MAKE SURE to check “Ignore Image Edges/Corners” because we do have vignetting problems.
   1. 1.  
   2. Once the background is entered, select
   :

• • • ‘Optimize on dynamic range’
    • Min exposure - 5 s, max exposure 2 m
    • Stacking time 20 m.
    • Read Noise Limit - 50%
    • Save screenshots of the graphs in this google folder, if there is no option to save them as e.g. PDF.

PUT USED VALUES IN PARENTHESES - e.g., rounding to units of 10 or even 50 is fine for actual observations.

1. Once this has been completed, go ahead and observe the field for a few (5-10) exposures in each filter according to the settings above. 

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