View Full Version here: : ZWO ASI1600MM Pro Cooled 1st Light – Nereid (m 18.7 moon of Neptune) and our Moon
Dennis
07-10-2019, 05:27 PM
On Oct 3rd despite some very hazy Brisbane skies, I managed to record the trace of Nereid in the Mewlon 210 at F9.2 using 60 x 60 sec exposures using The Sky X Pro to image and autoguide. I believe that the default settings in The Sky X Pro for the ASI1600MM are Offset=10 and Gain=75.
The next evening, I swapped out the Tak x0.8 Reducer and fitted the Tak x1.6 Extender (efl=3864mm) and grabbed 1000 frames of our Moon in Firecapture, this time at a Gain of 220.
Such a versatile camera.:)
Cheers
Dennis
h0ughy
07-10-2019, 05:31 PM
Must be happy with that result Dennis, the moon looks good
Wowser - those are just stunning Dennis.
Love the close in shots. Gotta be happy with that purchase.
Merlin66
07-10-2019, 06:51 PM
Dennis,
Well done mate!
I’m impressed with the annotated magnitude image.
Which software did you use to produce this image??
peter_4059
07-10-2019, 07:08 PM
Wow - those Moon images are amazing. So clear. Capturing Nereid is also quite a feat I suspect.
Well done.
Dennis
07-10-2019, 08:04 PM
Thank you for looking and your comments Dave, Rob, Ken and Peter, I appreciate them.:)
I was quite familiar with ASI120 and ASI174 cameras for Lunar, Solar and Planetary with their smaller chip sizes, which I found were quite suited to the Mewlon series of Dall-Kirkham designs. I was a little nervous stepping up to the larger chip of the ASI1600 as I do get some off-axis coma when using my Canon DSLR cameras, which have either APS-C or full frame sensors.
The lunar shots are crops from the quite sharp centre region, so the softer outer edges have been cropped out.;)
For the deep sky Nereid frames, I accepted the default settings of The Sky X Pro (Offset=10, Gain=75) as this was a new camera and I have yet to get my head around the various combinations of Offset and Gain settings.
What I did find surprising was when I plugged my Nereid frames image data into the Starizona Exposure Calculator, the recommended sub-frame exposure for my BG sky measurements was 0.04 mins = 2.4 secs versus my 60 sec subs – gulp!:eyepop:
Cheers
Dennis
Dennis
07-10-2019, 08:12 PM
Hi Ken
The annotated image is made up of 2 Layers in PS CC.
The Background Layer is a 1024x1024 crop from my image and the Top Layer is a screen capture from SkyTools 4 Imaging. In ST4, I created my imaging set up (scope, camera, Barlow, etc.) and it daws the FOV around the region, so I turned on all the labels and took a screen shot.
I set the Top Layer (ST4) to “Lighten”) and all the ST4 data then appears on my BG image.
Cheers
Dennis
Merlin66
08-10-2019, 08:06 AM
Dennis,
Great idea, great presentation.
Well done!!
(I usually overlay a solved fits image in CdC and blink to determine magnitudes and "new" objects.)
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