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William Seger

(10,775 posts)
Mon Nov 23, 2020, 02:04 AM Nov 2020

Deneb

Last edited Mon Nov 23, 2020, 09:47 AM - Edit history (1)

It was a crappy night for shooting -- about 75% cloud cover and Class 6 light pollution -- but I really wanted to just practice shooting and stacking images with Sequator before travelling to a dark sky site. About the only clear area was toward Cygnus, so I pointed my 50mm lens that way and took 220 shots at 1.6 sec, ISO 1600. I'm really amazed at how well this technique works: In an area where I could only visually see a half-dozen stars, the stacked images clearly show the Milky Way and several dark nebula "coalsacks" and even a hint of the North America nebula above and a little to the left of Deneb, the bright star near the center. I'm especially amazed at all the star colors. If you haven't tried stacking, it's really fun!


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Deneb (Original Post) William Seger Nov 2020 OP
Stunning shot. I just can't wrap my mind around how vast the universe is. catbyte Nov 2020 #1
Picture is not showing up for me. ShazzieB Nov 2020 #2
If you're using Chrome, there seems to be a problem William Seger Nov 2020 #3
Thanks for the info! WinstonSmith4740 Nov 2020 #10
Thank you. mountain grammy Nov 2020 #21
It's a new, perhaps overly aggressive, Chrome security feature hunter Nov 2020 #7
Ah, thanks for the explanation William Seger Nov 2020 #12
Right click on the icon, chose 'Open Image in a New Tab' flamin lib Nov 2020 #9
Impressive. byronius Nov 2020 #4
I'm so glad you tried this! It really works well as a dark sky photo. CaliforniaPeggy Nov 2020 #5
Neat shot and a technical question..Did you use any sort of tracking? mitch96 Nov 2020 #6
No tracking William Seger Nov 2020 #8
i use nebulosity for stacking rdking647 Nov 2020 #20
My God. It's full of stars . . . 2001 a Space Odyssey nt flamin lib Nov 2020 #11
Good lord, where's the space in space? It's crowded out there! Karadeniz Nov 2020 #13
Wonderful! paleotn Nov 2020 #14
Amazing. I wish I lived further out of town. marble falls Nov 2020 #15
Which dark shy area is near you? 3Hotdogs Nov 2020 #16
East of Colorado Spings near the small town of Kit Carson William Seger Nov 2020 #17
Great shot.. thanks for that link. mountain grammy Nov 2020 #22
You're a time traveller! LudwigPastorius Nov 2020 #18
I've heard of stacking. JohnnyRingo Nov 2020 #19
Thanks for sharing! Nitram Nov 2020 #23

ShazzieB

(16,272 posts)
2. Picture is not showing up for me.
Mon Nov 23, 2020, 02:20 AM
Nov 2020

I hope this is only temporary, because I'd love to see it. Guess I'll check back tomorrow.

William Seger

(10,775 posts)
3. If you're using Chrome, there seems to be a problem
Mon Nov 23, 2020, 02:24 AM
Nov 2020

Firefox and Edge don't have the problem, but in Chrome, if you right-click and "Open image in new tab" it works.

hunter

(38,302 posts)
7. It's a new, perhaps overly aggressive, Chrome security feature
Mon Nov 23, 2020, 09:18 AM
Nov 2020

It won't embed unsecure (http) content in a secure (https) web page.

DU is https, the image is http.

CaliforniaPeggy

(149,517 posts)
5. I'm so glad you tried this! It really works well as a dark sky photo.
Mon Nov 23, 2020, 02:41 AM
Nov 2020

I tried to see the photo on my iPhone, and it didn't show there. So I woke up my desktop computer and wow, here it is.

Thanks for sharing and posting.

I look forward to seeing your future photos.

mitch96

(13,870 posts)
6. Neat shot and a technical question..Did you use any sort of tracking?
Mon Nov 23, 2020, 08:41 AM
Nov 2020

1.6 sec x220 shots is like 5.5-6 seconds. I can't tell if there is any motion or is it just insignificant..
m

William Seger

(10,775 posts)
8. No tracking
Mon Nov 23, 2020, 09:41 AM
Nov 2020

At 1.6 seconds, the exposures are too short to see any star trails with this lens. I could have gone several seconds longer but I'm still experimenting; I was going to do a second set with a longer exposure, but I got cold. Stacker programs like Sequator and Deep Sky Stacker actually locate the stars in the images and align them.

 

rdking647

(5,113 posts)
20. i use nebulosity for stacking
Thu Nov 26, 2020, 11:42 PM
Nov 2020

just got a light pollution filter,i hope to try it out after the full moon

3Hotdogs

(12,323 posts)
16. Which dark shy area is near you?
Tue Nov 24, 2020, 08:30 AM
Nov 2020

The closest I got to one was Dark Sky festival in Bar Harbor. What a time that was. It included a nighttime boat trip to the edge of the harbor, followed by astronomer narration.

William Seger

(10,775 posts)
17. East of Colorado Spings near the small town of Kit Carson
Tue Nov 24, 2020, 10:39 AM
Nov 2020

I just checked on Google maps, and the Class 1 area I was looking at -- about 15 miles north of Kit Carson -- is actually about 2 hours away. However, I can get to a spot about 15 miles west of Kit Carson in an hour-and-a-half, and although it's rated Class 2, it's almost as dark: artificial brightness of 1.93 ?cd/m^2 versus 1.57 ?cd/m^2 according to lightpollutionmap.info. Compared to the almost 2000 ?cd/m^2 where I live, where this photo was taken, that's almost heaven!

A few years ago, I went camping in Chaco Canyon, NM, which is an official Dark Sky National Park, and it does have some of the darkest skies I've ever seen -- the Milky Way was so bright, I swear it cast a shadow on a moonless night. They have a small observatory, and an astronomy club from Farmington brings telescopes and give presentations there on Saturday nights during the summer. I literally took a couple of thousand pictures of the ruins there during the day, but only a few 4-second shots of the Milky Way -- at the time, I wrongly assumed that you need a telescope to get any interesting astrophotos, and I didn't know anything about stacking. And, according to the light pollution map, the sky there has an artificial light rating of 7.10 ?cd/m^2, so I'm really looking forward to this trip to Kit Carson!

LudwigPastorius

(9,100 posts)
18. You're a time traveller!
Wed Nov 25, 2020, 12:34 AM
Nov 2020

That picture of Deneb is from 2,600 years ago, back when Tarquin the Elder was the king of a tiny city-state on the Apennine Peninsula called Rome.

mind-blowing...thanks

JohnnyRingo

(18,618 posts)
19. I've heard of stacking.
Thu Nov 26, 2020, 08:44 PM
Nov 2020

The images in "Astronomy Picture of the Day" often hosts pix that employ the method on their daily posts. I'm going to research it and try to learn more now that you mentioned it.

Did you use a telescope, or just zoom and a wide angle? I'll have to find out why stacking works as well as an extra long exposure. I'm guessing stacking takes the place of a motor drive that syncs the world rotation. Each image would have to be aligned with one object so the rest falls into place. Still, I don't understand yet. Would like to see your results.

Thanx for posting

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