20210527 - M13, the unfinished business - New subs and processing and learning to work with 2 layers.
What was the experience
[NL] Nieuwe poging om 2 layers van subs te capteren. Eerst nog geprobeerd om de vorige subs van begin Mei te recupereren, maar de oriëntatie zat verkeerd (de ASI 462 heeft een zeer ‘breedbeeld’-formaat en ik had originele oriëntatie niet vastgelegd. De overlap met de nieuwe subs was niet voldoende, dus maar nieuwe subs gemaakt.
[EN] New attempt to capture subs for 2 different exposure layers. I’ve tried to recuperate the subs from early May, but the orientation was all wrong (ASI 462 has a very ‘broad’ image, and I hadn’t noted down the original orientation). The overlap wasn’t good enough, so I captured new subs/layers.
What’s in the picture(s)
M13 - The “Great Globular Cluster” -
https://en.m.wikipedia.org/wiki/Messier_13Quote: “Messier 13 or M13, also designated NGC 6205 and sometimes called the Great Globular Cluster in Hercules or the Hercules Globular Cluster, is a globular cluster of several hundred thousand stars in the constellation of Hercules.
Although only telescopes with great light-gathering capability fully resolve the stars of the cluster, M13 may be visible to the naked eye depending on circumstances. With a low-power telescope, Messier 13 looks like a comet or fuzzy patch.
In traditional binoculars, the Hercules Globular Cluster appears as a round patch of light. At least four inches of telescope aperture resolves stars in M13's outer extent as small pinpoints of light. However, only larger telescopes resolve stars further into the center of the cluster.”
How it was done
Mount: iOptron SkyGuider Pro
Guiding: ASIAIR Pro, ZWO30F4, ASI120MM (RA guiding only)
Scope: WO RedCat 51
Camera: ASI462MC
Resolution: 2.38”/pixel
Filter: Astronomik UV/IR L1
Moon 100%(-), Bortle 5/6
Processing: Siril, Adobe Photoshop (Mac)
M13 layer 1 - Gain 125, 60s, 60x, darks 20x
M13 layer 2 - Gain 125, 120s, 30x, darks 20x
What have I learned from this
[NL] Eerste keer 2 images als layers combineren in Adobe PS, op z’n minst heb ik hierdoor dit al bijgeleerd. De exposure van de subs had best nog wel wat anders geweest om meer/minder detail in de Outer/inner areas van de cluster te krijgen. Maar toch al weer een stap vooruit.
Resolutie blijft een beetje under par om een echt scherp beeld te hebben (2.38”/pixel), maar de nieuwe camera komt er aan ....
[EN] First time combining 2 images as 2 different layers in Adobe PS, at least I’ve learned that by doing this. The exposures of the subs could’ve been slightly better to capture more/less detail in the outer/inner areas of M13, but it’s a step forward in my processing skills.
Resolution remains a bit under par for the RedCat/ASI 462 combination (2.38”/pixel), but the ASI 183 camera just got delivered 🤩, and will give me slightly better 1.98”/pixel and a FoV of 122’, so looking forward to test that one out ✨😉📷
Clear Skies everybody! 🤩✨🔭
#astrophotography #astrophoto #astrophotos
#backyardastronomy #astronomy
#backyardastrophotography
#astrography #astrography_ #backyard
#deepsky #nightsky
#M13 #Messier #GreatGlobularCluster
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