Astrophotography: 53 hours spent capturing less common emission nebula, NGC 6820
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- Опубликовано: 12 сен 2023
- Equipment used for this shot:
Telescope: AT115EDT
Camera: ZWO ASI1600MM
Mount: SkyWatcher EQ6R Pro
Filters: Astrodon 5nm, Ha & Oiii
Music:
'Midsommar' by Scott Buckley - released under CC-BY 4.0. www.scottbuckley.com.au
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#astrophotography
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Yeah don't ever stop the workflow videos. Always a great help!
Will do! Thank you for being a long time subscriber :)
@@DSOImager I switched from the AT115EDT to a 152mm Achromat and now an old used Orion 10 inch steel tube newt. I seriously hated the idea of the newt at first but this thing is a BEAST man. Data is stunning to say the least. The detail. No matter how many hours I got with the 115 it could never touch the 152 in terms of image detail. The 10 inch @ f4 is over the top though.. And all that talk of collimation being hard or not holding.SMH. I been using the newt for over a month and collimation is solid. I have to carry n mount the OTA each session. You might seriously consider a cheap newt with upgraded focuser. I'm super glad I gave one a try. Never going back to a refractor LOL!
@@qx3V45p That is really good to hear. A 10" newt at F4 is a serious light bucket! My concern with them is the frequent collimation check. I've gotten a bit lazy.. I just want to uncover the scopes and kick of the sequence. Tinkering with gear is my least favorite part of the hobby.. well second least favorite.. I hate taking calibration frames, lol.
That said I have not ruled out a newt completely but it will need to wait My next big purchase will probably be a mount.. something big to future proof capacity, then after that I need a camera upgrade. After all that I'll start looking at scopes :)
@@DSOImager Collimation was a MAJOR concern for me as I don't like touching my image train and really don't have time to waste when imaging before marine clouds roll in. I used the Ocal collimator and did collimation indoors. (Very accurate when used correctly--easy to do) Locked down primary iteratively until very tight, while viewing position on computer screen.(Ocal) The tight lock down bolts remove primary springs from the equation so it can't move/shift.
Sec mirror I added a SS washer to the secondary stalk, for a harder surface to interface with the adjustment screws. Again iteratively tightening til very solid. I can push on the mirror stalk and see no deflection on screen, so pretty solid.
Star test show collimation hasn't changed since. For DSO's collimation doesn't have to be absolutely perfect anyhow since we're not doing high mag. It's very close though just using the OCAL. Great tool.
Maybe start with an 8 inch. The 10 is over 40lbs fully loaded and makes an 8 look like a toy. Hit me up if you want pics of the build or any data to check out. I have a few targets completed so far. Weather hasn't been very cooperative but I anticipate things will change shortly.
Great capture James, your work is phenomenal man , keep it coming.
Thanks! Really appreciate it :)
beautiful image, James! As always great work and thanks for the mini tutorials on your processing.
Thank you so much! :)
Most helpful James, thank you for this. If I understood your “moon” captures: 1.) Full moon to 80%-okay for Sii, as long as far enough away from moon, 2.) 79% to no moon, okay for Ha, 3.) no moon, okay Oiii. I find this information priceless!!!!
Yep, you got it. That's the guideline I've set for myself based on my own experiences shooting with them moon out. :)
Great video James , I like it better a little more desaturated but not by much otherwise what an effort!!
Thanks! Im sure ill tweak it a little more :)
Great image and video, James. I tried this one last year, and it was a total flop! You've inspired me to put it back on my list for next summer. Clear skies, Matt
Thanks Matt! It's worth another shot for sure :)
Great image James and I think you are right, targets get more attention if they have common names... so The Harvester Nebula it should be.
Thanks Logan! I wonder if there is a process to get some of these targets named. How did the pacman nebula get its name?
Nice image James and I like the way you leave some green in. Maybe a smidge overcooked for me however Im often guilty of going the opposite way and often end up with wishy washy images. I think it's our Astrophotohers Greek curse like Sisyphus the guy who rolls the boulder up the hill for eternity.😫
Sisyphus is a great analogy. Thanks!
Good video, as usual. I really like using the Ultimate when the moon is out or the target is getting close to the streetlights but I actually like the Extreme better in my Bortle 7-8 backyard. The Ultimate is excellent for extracting Ha IMO. Great images as usual! Now I have to go reprocess my Thor!
Thanks Rod! Thor is such an awesome target :)
Great picture again James. I happened to actually have this target (Sh2-86 I believe) on my list for August/September. It's very small though at 360mm and pretty faint so I didn't dare spending the rare clear hours on it. 'Another string of clear nights'. I can only dream of that :-)
As for image feedback: it could be slightly less contrasty and saturated for my taste but that's totally subjective.
Thanks Justin! Its a cool target. It is small, but there is a lot if fainter structure. I think it will look good at the wider fov with enough integration.
Consensus seems to be that i over cooked this one a little. Ill probably tweak it before posting on astrobin 😀
To me, it looks like The Middle Finger Nebula !!!😂
Lol!
I like all images. Color doesn’t matter. I use narrowband normalization now. Bang and done! Moving to another target.
I will try this target. Let’s see how many hours I need to pull it from bortle 7. What SNR for Ha, S2 and O3 did you get?
s2 = 1.157e+04, 40.63 db
ha = 1.143e+04, 40.58 db
o3 = 1.479e+04, 41.70 db
@@DSOImager Excellent, thanks!
I recently got Tak Epsilon 130D. Phenomenal scope. Colors of stars are unmatched, Esprit 120 and 9.25 Edge do not come even close. However, most remarkable is sensitivity. 4 hours of Ha of Pac-Man nebula from bortle 7 gave whooping 450 db. 5 h S2 of Bubble Nebula region is 60 db. It pulls RGB (no L) of these nebula after just 30 min!
@@anata5127 Grats on the new scope! The Epsilon is under consideration. Ill be interested in hearing how well its holds collimation.
@@DSOImager This is key point. Upon arrival from Japan, it was collimated in Takahashi USA, Houston. Rotation of focuser is deadly for collimation. But there is exception - Moonlite focuser. So, they installed focuser and collimated.
I drove there and picked it. About 4 months are passed, it still keeps collimation perfectly as promised. They promised 2 years, if no excessive shaking. I set up scope every clear night, and wrap it up in morning.
Collimation of this scope is extremely difficult and unique. I have a deal with Tak USA that I will drive it to them, if I need collimating. In reality, there is only few experts in USA for this scope collimating.
One more thing, be prepare to spend about 2K extra for accessories. Yep, this is unfortunate reality.
@@anata5127 two years would be pretty good. I know the collimation is very tricky with these.