M13

 Posted: Apr 22nd, 2026
Show astrometry on hover
NGC
IC
HD
Technical Info
Telescope/Lens: Dual rig
Camera: ZWO ASI533MM pro + zwo 585mm
Mount: JUWEI 14
Guide Scope: zwo 220 mm +30x120mm
Software: Siril ,pixinsight, photoshop
Accessories: Ir cut +uhc baader
Exposure:
127 x 300" ISO/Gain: 100
Yellow, Bortle 5 zone:
 Kaliningrad, Russia
 Apr 20th, 2026
10 h 35 m
126
Resolution: 1239x763 px
Scale: 545 KB
I photographed M13 with a DUAL RIG just outside the city, from a concrete column in my garden.
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Comments

Could there be a mistake, exactly 12 hours?
22 Apr, 2026 Reply
Andrey Replied to Poppy8micro
The error was only 150, and without defects, 127 came out... Thank you for the clarification.
22 Apr, 2026 Reply
Poppy8micro Replied to Andrey
Why so many frames? And why is it black and white? I think an hour would be more than enough.
22 Apr, 2026 Reply
Andrey Replied to Poppy8micro
In our region, you won't see much with less than 8 hours... moisture, sea, and fog... and black-and-white to gather signal more efficiently and get more...
22 Apr, 2026 Reply
Poppy8micro Replied to Andrey
Sorry, I didn't notice right away that the cameras are monochrome. Now I'm really confused. I guess I need to shoot with RGB filters? And how do you later combine the data from two different cameras?
23 Apr, 2026 Reply
Poppy8micro Replied to Andrey
I think if you shot one hour per channel for RGB, it would be much more effective. And why do you need a UHC filter with monochrome?
You need completely different filters, in my opinion.
23 Apr, 2026 Reply
Andrey Replied to Poppy8micro
Just in Siril in pixels... it doesn't matter which cameras or how many... you crop to the smallest sensor size, and StarAlignment in PixInsight stacks it precisely and evenly.
23 Apr, 2026 Reply
Poppy8micro Replied to Andrey
I know, I'm just asking because the result isn't always worth it. Combining such factors with pixel size. I only have color sensors like that myself. Probably because with monochrome, you don't get a frame after stacking. If I stacked from two cameras like that, I'd get a square frame from the 533 or a rectangular one depending on which frame is the reference. And I'd definitely have to crop. I'm interested in the nuances, that's why I'm asking. Thanks for the explanations—my goals are purely educational.
23 Apr, 2026 Reply

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