Methane Notes on Saturn and Jupiter

 Just wanted to write the settings and config down for future reference.

With the C11, 2x barlow, the QHY 462C, SATURN capture settings in FireCapture are USB traffic = 3, Gain = 417, Exposure = 248.535067566729.

(Looking at the Saturn video (2020-09-24-0516_1.avi), it's possible I did not have the barlow in place.)

On JUPITER with same gear as above, I had one short video with the same exact exposure and gain settings.   Then I also had a run with Gain = 546 and Exposure = 315.876081949843.  Oddly, this second capture (which was the first one where I tried Methane - 2020-09-24-0628_9.avi) is dimmer than the first video mentioned (2020-09-24-0501_1.avi).  

Hm...  it's possible I tried using the Siebert UV barlow with the 2020-09-24-0630_4.avi file. 

The cleanest Jupiter video is the 2020-09-24-0501_1.avi which was the last methane video I shot that evening. 

It looks like I'm going to have to try just doing this all over and take careful notes on which barlow I'm using on which camera.

My guess is that the best combo is with the TV 2x barlow since the cleanest video show Jupiter as 20-30% smaller than others.  (The Seibert barlow is 2.5x).

I do remember that the QHY290m camera was really bad at methane as I had to push the exposure to 500+ ms with really high gain settings.   Based on QE graphs, it looks like the 290m only picks up about 40% of relative response at 900nm vs 80% from the 462C.