NGC 1365 high gain

oska (John) · #1 03-10-2022, 10:59 AM

Set up last night at midnight as the clouds were clearing just to do some backlash measurements. So not great but anyway... I was waiting for Orion to clear the trees as the seeing was really poor, lots of dew, and figured I'd take Alex's advice and give high gain a bash. The optimal exposure calc in Nina said 15 secs at 350 gain (unity is 139), normally I would expect below a second at that gain for NGC1365.

46 x 30s
-10C, gain 350.
ASI1600MC. EON 85.
Uncalibrated.

Best single frame for reference, jus a stretch

xelasnave · #2 03-10-2022, 11:44 AM

As long as you are happy is the main thing... the main thing is you did very well given conditions pressure of time and listening to me.
Your focus seems spot on ...was it?
How do you focus as I am sure many could benefit from you sharing your experience.

Alex

oska (John) · #3 03-10-2022, 06:14 PM

Thanks Alex. I don't know about spot on, but by the numbers it was pretyu good. I am usually getting about 2.45 HFR but last night it was 2.15 How? I use an eaf and let nina do it

First time ever it was that low. So luck?

AstroViking (Steve) · #4 03-10-2022, 08:17 PM

Holy cow..... That's a lot of galaxies in there!

Great image, John.

Doogs38 (Alex) · #5 03-10-2022, 09:05 PM

Great image John. Imagine what that would look like with a few hours of integration! Alex

oska (John) · #6 03-10-2022, 09:43 PM

Thanks Alex, I am feeling the same. When you compare it to my previous with 2hrs of integration it's rather remarkable.

Dave882 (David) · #7 03-10-2022, 11:58 PM

Great image well done!!

oska (John) · #8 04-10-2022, 02:00 AM

Cheers Dave. I might have the high gain bug.