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Astrophotography
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| Fireinthehole- | Date: Saturday, 13.09.2014, 17:53 | Message # 361 |
 Pioneer
Group: Translators
Sweden
Messages: 365
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| Watsisname, extraordinary pictures 
Love Space Engine!
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| Watsisname | Date: Monday, 15.09.2014, 14:45 | Message # 362 |
 Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
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| Thanks guys, though I maintain I've got nothing compared to Antza's work.
One more for M31.
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| midtskogen | Date: Monday, 15.09.2014, 20:45 | Message # 363 |
 Star Engineer
Group: Users
Norway
Messages: 1674
Status: Offline
| Nice ones, Wats! The technical details?
NIL DIFFICILE VOLENTI
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| Watsisname | Date: Tuesday, 16.09.2014, 15:59 | Message # 364 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
Status: Offline
| Sure thing:
Canon EOS Rebel T3 @ 18mm (EF-S 18-55mm f/3.5-5.6 IS II lens)
20s @ f/3.5, ISO1600
Tungsten white balance (raised to 4200K; incandescent might have been better)
RAW format with post editing in Gimp/UFRaw.
The first two were taken at Mount Baker, where the sky is pretty dark (limiting magnitude 6.6-7.0) though the rising gibbous moon degraded sky quality a bit. Reasonable trade-off for illuminating the volcano in the second shot. The third was taken on my deck (limiting magnitude 5.5-6.0), with no moonlight.
I've got the Rokinon 16M-C 16mm f/2.0 lens on my Christmas list, can't wait to see how that performs in comparison to the zoom.
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| midtskogen | Date: Friday, 19.09.2014, 08:13 | Message # 365 |
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Star Engineer
Group: Users
Norway
Messages: 1674
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| I have almost no zoom lenses because of the speed loss, but zoom lenses aren't such a show stopper for low light photography as they used to be (back in the analogue days).
Added (19.09.2014, 07:13)
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Looks like a meteor, but it partly travels in front of terrain and it only appears in one frame of a video. So most likely it's a cosmic ray artifact. The biggest one that I've seen, though. Close up:
NIL DIFFICILE VOLENTI
Edited by midtskogen - Friday, 19.09.2014, 08:15 |
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| Stargate38 | Date: Friday, 19.09.2014, 19:57 | Message # 366 |
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Astronaut
Group: Users
United States
Messages: 58
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| That's definitely NOT a meteor! If it was, it would go behind the terrain. I think a single cosmic ray sneaking through Earths magnetic field is definately possible, especially since you live closer to the north pole where they (along with solar wind) play a part in the formation of the Aurora Borealis.
Also, What are those black boxes? Are there vehicles there that you (or your neighbors) didn't want to be shown online?
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| Watsisname | Date: Saturday, 20.09.2014, 00:05 | Message # 367 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
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| I thought cosmic ray strikes usually appeared as specks. They sometimes appear linear? Seems like it would take a very improbable intersection angle on the sensor.
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| Watsisname | Date: Saturday, 20.09.2014, 11:52 | Message # 368 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
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| Close-up of the Andromeda Galaxy with just the DSLR and tripod (no tracking mount). Even got M32 and M110!
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| HarbingerDawn | Date: Saturday, 20.09.2014, 12:15 | Message # 369 |
 Cosmic Curator
Group: Administrators
United States
Messages: 8717
Status: Offline
| Quote Watsisname (  ) Close-up of the Andromeda Galaxy with just the DSLR and tripod
Great job! But I am jealous of your sky. This is what it looks like where I live under the best circumstances (single exposure). M 110 is barely visible.
Keep the photos coming Wats!
All forum users, please read this!
My SE mods and addons
Phenom II X6 1090T 3.2 GHz, 16 GB DDR3 RAM, GTX 970 3584 MB VRAM
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| FastFourierTransform | Date: Saturday, 20.09.2014, 12:17 | Message # 370 |
 Pioneer
Group: Local Moderators
Spain
Messages: 542
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| Amazing!!!
Only with a camera. Galileo would be soooo proud
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| HarbingerDawn | Date: Saturday, 20.09.2014, 12:44 | Message # 371 |
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Cosmic Curator
Group: Administrators
United States
Messages: 8717
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| Quote FastFourierTransform ( ) Galileo would be soooo proud
My camera with a 300mm lens is almost exactly as capable as Galileo's telescope was (low-light and wide-field abilities aside). When I take pictures of the Moon, or Jupiter, or Saturn, I see almost exactly the things that Galileo saw; in fact his sketches and descriptions match my images almost perfectly. I feel a personal connection to history when I capture and view those images, it's a wonderful thing.
All forum users, please read this!
My SE mods and addons
Phenom II X6 1090T 3.2 GHz, 16 GB DDR3 RAM, GTX 970 3584 MB VRAM
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| Watsisname | Date: Saturday, 20.09.2014, 21:38 | Message # 372 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
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| Quote HarbingerDawn ( ) This is what it looks like where I live under the best circumstances (single exposure). M 110 is barely visible.
That actually looks extremely similar to my raw frames. Here's one with no editing, just luminance desaturation and rotated to be in same angle:
I bet you could get really good results with RAW & stacking, even with the light pollution.
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| HarbingerDawn | Date: Saturday, 20.09.2014, 22:32 | Message # 373 |
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Cosmic Curator
Group: Administrators
United States
Messages: 8717
Status: Offline
| Wow yeah, yours is only very slightly darker. I'll have to go out sometime and see what I can do
All forum users, please read this!
My SE mods and addons
Phenom II X6 1090T 3.2 GHz, 16 GB DDR3 RAM, GTX 970 3584 MB VRAM
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| midtskogen | Date: Sunday, 21.09.2014, 12:58 | Message # 374 |
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Star Engineer
Group: Users
Norway
Messages: 1674
Status: Offline
| Quote Stargate38 ( ) Also, What are those black boxes? Are there vehicles there that you (or your neighbors) didn't want to be shown online?
Yes, I figured that some might not be too happy about having their windows or front doors online and recorded, so I added those.
Quote Watsisname ( ) I thought cosmic ray strikes usually appeared as specks. They sometimes appear linear? Seems like it would take a very improbable intersection angle on the sensor.
Apparently, but I find it surprising myself, in particular such a long line. I'm not sure what the physical explanation is. But I have no other explanation, unless someone in my neighbourhood is firing with tracer ammo.
If you search for cosmic ray artifact Google will give you similar pictures.
NIL DIFFICILE VOLENTI
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| Watsisname | Date: Sunday, 21.09.2014, 22:30 | Message # 375 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
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| I think cosmic ray (or muon decay product of one) is by far the most likely explanation, it's just that as you say the extreme track length is surprising. It makes a lot more sense now after realizing the sensor is oriented roughly vertically, unlike in most terrestrial-based CCD astronomy. Then you expect fewer events, but longer tracks on average, with ones as long as that rare, but inevitable given enough time.
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