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DiscoDuck
16-08-2021, 06:49 PM
I just replaced my ZWO 1600MM with a 294MM and my first target to test it out on was the Helix.

About 12 hours of Ha, 5 of OIII and 1 each of RGB (for star colours) taken in a dark sky site with an RC8 + Mach1 mount.

Astrobin version is here (https://www.astrobin.com/re0j28/).

The 294 has a lot of amp glow compared to the 1600, and some very weird looking flats. But all seemed to calibrate out ok. Dew and wind provided some "fun" challenges too :(

Edit: updated attached image to latest version after a number of updates.
AdamJL
16-08-2021, 07:06 PM
oh wow. That's stunning!!
PKay
16-08-2021, 08:33 PM
Nice one Paul

I gathered a few hours of S2 on this last night for interest, not much there.

Well done :thumbsup:
JA
16-08-2021, 08:41 PM
Super job DD :thumbsup:

Best
JA
Peter Ward
16-08-2021, 08:45 PM
That is a very eye-soothing result (pardon the pun). Very good indeed :thumbsup:
gregbradley
17-08-2021, 07:15 AM
Super image. Great detail and colour. Stars have no colour though. What happened there? Exposures too long for the stars?

Greg.
DiscoDuck
17-08-2021, 08:16 AM
Thanks Adam.



Thanks Peter. Interesting re S2. I was wondering if that was worth grabbing too - but didn't have enough time at the dark sky site.



Thanks JA.



Thank you, Peter. Pun appreciated! :-)



Doh. I added the star colour improperly. Thanks for spotting. I'll redo that. I don't think there's a lot of colour in the brighter stars so I didn't notice. But I undercooked the RGB image before combining. Thanks.

Edit: Astrobin link is now to newer version.
strongmanmike
17-08-2021, 08:18 AM
Top shot Paulie :thumbsup:

Aaaah...yep, Helix season is upon us :)

Mike
DiscoDuck
17-08-2021, 08:32 AM
Thanks Mike :) Aye (pun intended - inspired by Peter!) that season it is.
gregbradley
17-08-2021, 05:38 PM
Ah that looks better with nice coloured stars. That's an A grade image there and a high standard.

Greg.
DiscoDuck
17-08-2021, 05:43 PM
Thanks Greg. And thanks again for catching the misstep.
gregbradley
18-08-2021, 02:06 PM
Did you use the 1x1 bin 47mp mode or the 2x2 mode? I assume the 2x2 which is the default.

Greg.
DiscoDuck
18-08-2021, 02:11 PM
Yes, 2x2. That gives a shade under 0.8" per pixel with my setup (RC8 with a 0.75x reducer down to 1200mm).