Photography
Related: About this forumDeneb
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!
catbyte
(34,333 posts)ShazzieB
(16,272 posts)I hope this is only temporary, because I'd love to see it. Guess I'll check back tomorrow.
William Seger
(10,775 posts)Firefox and Edge don't have the problem, but in Chrome, if you right-click and "Open image in new tab" it works.
WinstonSmith4740
(3,055 posts)That shot is awesome.
mountain grammy
(26,598 posts)hunter
(38,302 posts)It won't embed unsecure (http) content in a secure (https) web page.
DU is https, the image is http.
William Seger
(10,775 posts)I've found a different server I can host photos on from now on.
flamin lib
(14,559 posts)It will display in the new tab.
byronius
(7,391 posts)CaliforniaPeggy
(149,517 posts)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)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..
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William Seger
(10,775 posts)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)just got a light pollution filter,i hope to try it out after the full moon
flamin lib
(14,559 posts)Karadeniz
(22,469 posts)paleotn
(17,881 posts)Good old Deneb. Cygnus flying south every Fall.
marble falls
(57,010 posts)3Hotdogs
(12,323 posts)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)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!
mountain grammy
(26,598 posts)We've camped in Chaco Canyon years ago.. Amazing. Time to return.
LudwigPastorius
(9,100 posts)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)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