SH2-119 - The Crimson Clamshell (Starless)

 Posted: Sep 6th, 2026
Technical Info
Telescope/Lens: Askar FRA500
Camera: ZWO ASI2600MM PRO
Mount: Sky-Watcher EQ6-R PRO
Guide Scope: ZWO OAG-L
Guide Camera: ZWO ASI220MM
Software: PixInsight, RC-Astro plugins
Accessories: Sharpstar Focal Reducer 0.7x ASKAR FRA 400 / 500
Exposure:
10 x 600" ISO/Gain: 100 - Antlia H-a 3nm
 Krasnodar S Balkona, Russia
 Jul 27th, 2026
1 h 40 m
139
Resolution: 6062x3924 px
Scale: 71481 KB
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Comments

Antlia filters with the 2600 really give amazing contrast. How much is allocated for the object?
6 Sep, 2026 Reply
Oeswww Replied to Poppy8micro
What is meant by "built-in"? The accumulation is indicated above. Removing stars increased the contrast. The stretch was some ordinary one, nothing elaborate. But this is still from a city balcony. In Mezmai, where I usually shoot, the contrast will be even higher. In red, of course, it won't be as contrasty anymore.
6 Sep, 2026 Reply
Poppy8micro Replied to Oeswww
I mean it's planned for shooting the object overall. I just went out into the yard and shot for half an hour; the weather didn't allow more. I think 5 hours on hydrogen is a great number for me, good contrast.
6 Sep, 2026 Reply
Oeswww Replied to Poppy8micro
Oh, I'm already operating at night. One night per filter and the minimum program is done. For me, for example, I'm getting F3.9, so I'm stacking faster. The ideal minimum is 24-32 hours in total. And yeah, it all depends on the weather. On the reflector, I blasted through each filter one by one, and whatever I managed to stack, that's what I got. The main thing is that there's data accumulated for each filter. But on the refractor, I have to refocus between filters. So there, I shoot one filter at a time.
6 Sep, 2026 Reply

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