Chicken to Eta

assbutt94 · #1 13-02-2021, 11:48 PM

I finally finished an edit of this area I imaged the other week.
This particular edit is HOO. 40 x 60s Ha - 39 x 60s OIII
There's also 40 frames of Sii, but I liked the look of HOO a bit more so processed this way first.
1600mm with a 100mm canon lens stopped to f4.
Focusing a camera lens kind of sucks compared to a SCT.

Any criticisms are welcome, I think some of the stars in the middle of the Carina nebula have a bit of dark ringing. The stars could be rounder, I just plonked the mount in the usual spot and went unguided. Autoguiding would be nice.

Higher Res: https://www.astrobin.com/pge4vr/

jahnpahwa (JP) · #2 14-02-2021, 09:25 AM

That field is unreal!
I didnt see the ringing that you mention, but am pretty gobsmacked at how well all the globs are resolved.

This just seems a perfect showcase of Southern hemisphere goodness, I'm a big fan

Oh, quick question about setting up with your lens. Did you need to polar and star align with it? Or did you use a scope first then sub-in the lens? I tried a widefield on vela with a similar set up, but sharpcap said no, apt also said no, so I just eyeballed it and pressed go.

AdamJL · #3 14-02-2021, 11:03 AM

love the wide-field image. I wasn't aware how big the chicken was, as Carina is a mighty nebula.
Really keen to see SII data in there

Hotpies (Brad) · #4 14-02-2021, 11:06 AM

Stunning wide field photo! I really, REALLY love this one. The framing is also perfect!
Beautiful work mate.

Nikolas (Nik) · #5 14-02-2021, 08:59 PM

Wonderful Widefield shot there!!! Great work!

assbutt94 · #6 15-02-2021, 09:12 PM

Cheers Jp.
My mount was plopped on the same spots on the concrete I always put it, I last polar aligned it with the SCT and drift align so just dropping it on the spot gets me under +- 30' of the pole. I then use the lens and camera to do a 1 star align on the HC to use go-to functionality for dim stuff, coincidently also Vela. I referenced stellarium, and bright stars in live view to roughly frame, followed by a test shot.
Plate solving is definitely better lol.

Thanks Adam, it's also rather bright! I'll probably play with it over the next week.

Thanks Brad and Nik!

assbutt94 · #7 21-02-2021, 05:26 PM

I've finally edited an image with the SII data
https://www.astrobin.com/zs93iy/

The colors look a bit funny being HOS, but you can definitely see more detail from the SII filter. The core of Eta nebula is a little less over exposed relative to the rest of the field now too, mostly because B channel is now solely SII filter.