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archonom β Quick test: Heart Nebula IC1805 in HA (2019-09-20)
#canon #nebulae #nightsky #scope #space #telescope #heartnebula #astronomik #ic1805 #amateurastrophotography #astrophotograohy
Published: 2019-10-06 08:35:43 +0000 UTC; Views: 827; Favourites: 54; Downloads: 7
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Description
Just a quick test capture: Heart Nebula IC1805 with narrow-band HA filter
Captured the Heart Nebula (IC1805) which appears as a very large object in the night sky.
Tested the narrow-band H Alpha CCD Filter for the first time. Unfortunately I didn't reach focus correctly and wasn't able to combine the HA data with my RGB frames.
This is why the image was down-scaled, it's harder to see that it is out of focus then
I am very pleased with the effect this filter has. Normally, a single capture is very bright, containing traces of light pollution. In this case, each frame is very dark and the contrast of the nebula is very good. Hopefully I will be able to test the filter again soon.
Unfortunately, it is very challenging for me to edit the stacked image and I was not able to combine it with my RGB data, which is most unfortunate. I guess this is the start of a new learning process then!
16 x 360s at ISO1600
Canon 1200D with Astronomik H Alpha CCD Filter, 12 nm
TLAPO804 480/80 f/6- Flattener
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Comments: 6
Not sure this a focus issue, more of a tracking stabilizer.Β
eugene
Still how great this is.
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Thanks for your comment!
When viewing the images at higher resolution, the bloated stars show that I was clearly out of focus. Tracking and guiding is not perfect in any capture I take, but in this case, it turned out ok.
Focusing with the Ha filter is hard: Only the brightest stars are visible in the live view, and when I am close to the perfect focus, I see no difference at all when moving 15 % away from it. So I didn't know when I was in perfect focus.
Next time, I will replace the Ha filter with a normal anti light pollution filter, reach focus and exchange the filters again.
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would this Ha filter also cause a focus shift, like what would happen with a IR 720 or higher wavelength?Β remember the focus shift marked on the lens when shooting IR.
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I guess so, yes. I always live focus, though.
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You'll get it with enough effort. Still impressiveπ
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