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Astrophotography
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| Watsisname | Date: Saturday, 25.04.2015, 19:31 | Message # 466 |
 Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
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| Yes, a fair bit brighter. It is often said that from a truly dark site, the central region is bright enough to cast visible shadows on the ground. (I couldn't tell; I think one must be at lower latitudes, where the center gets higher in the sky).
Even though the center is the brightest, what we see is only a shadow of its true nature, thanks to the large extinction caused by interstellar dust. Without it, the center would shine brilliantly, as this near infrared image shows.
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| pzampella | Date: Sunday, 26.04.2015, 23:24 | Message # 467 |
 Space Pilot
Group: Users
Venezuela
Messages: 115
Status: Offline
| Last night I tried to shoot the center of the galaxy, but it didn't worked (for now).
However, I took this shot of Omega Centauri at midnight:
Metadata:
-Focal length: 300mm (Canon 75-300mm lens).
-1/f: 5.6.
-Exposition: 400 shots of 1sc.
-ISO: 6400.
Pre-process: DeepSpaceStacker.
Post-process: Photoshop.
Edited by pzampella - Sunday, 26.04.2015, 23:30 |
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| Watsisname | Date: Monday, 27.04.2015, 00:13 | Message # 468 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
Status: Offline
| Very nice capture! I wish I could see ω Cen, but it only gets -6° above my horizon. =(
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| midtskogen | Date: Monday, 27.04.2015, 07:10 | Message # 469 |
 Star Engineer
Group: Users
Norway
Messages: 1674
Status: Offline
| A fragmenting red meteor last night.
NIL DIFFICILE VOLENTI
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| pzampella | Date: Thursday, 07.05.2015, 14:40 | Message # 470 |
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Space Pilot
Group: Users
Venezuela
Messages: 115
Status: Offline
| Hello! I need some opinions and I think this is the best place to ask.
I want to buy a telephoto lens, but I can't afford a $7000 Canon lens or anything like that. So I would like to buy one this two products:
Opteka 420-1600mm f/8.3 HD Telephoto Zoom Lens
Opteka 650-2600mm f/8 HD Telephoto Zoom Lens
Will it be good enought to shoot the Moon, Venus, Jupiter...? Or am I being too cheap and I will regret it?
Thanks!
Edited by pzampella - Thursday, 07.05.2015, 14:53 |
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| steinarmidtskogen | Date: Thursday, 07.05.2015, 18:08 | Message # 471 |
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Observer
Group: Newbies
Pirate
Messages: 3
Status: Offline
| I don't know about these lenses, but just make sure that your camera has mirror lock before you buy something longer than 500 mm. Otherwise you'll struggle to get sharp images.
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| pzampella | Date: Thursday, 07.05.2015, 18:33 | Message # 472 |
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Space Pilot
Group: Users
Venezuela
Messages: 115
Status: Offline
| steinarmidtskogen, even for such a steady shots? I mean, I will be using a tripod and a I will be shooting from my laptop (won't even touch the camera).
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| HarbingerDawn | Date: Thursday, 07.05.2015, 19:11 | Message # 473 |
 Cosmic Curator
Group: Administrators
United States
Messages: 8717
Status: Offline
| Quote pzampella (  ) I will be using a tripod and a I will be shooting from my laptop (won't even touch the camera).
That doesn't matter. The vibration from the camera's reflex mirror can blur shots, so you need to enable mirror lockup when shooting so that you can lock the mirror open and let the vibrations dampen before opening the shutter. What kind of camera do you have?
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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| pzampella | Date: Thursday, 07.05.2015, 19:25 | Message # 474 |
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Space Pilot
Group: Users
Venezuela
Messages: 115
Status: Offline
| HarbingerDawn, Canon Rebel EOS T5
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| HarbingerDawn | Date: Thursday, 07.05.2015, 19:36 | Message # 475 |
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Cosmic Curator
Group: Administrators
United States
Messages: 8717
Status: Offline
| Quote pzampella ( ) Canon Rebel EOS T5
That certainly has mirror lockup, so you have no problem there. Find it in somewhere in the advanced settings and map it to your custom menu. Refer to the user manual if necessary.
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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| pzampella | Date: Thursday, 07.05.2015, 19:42 | Message # 476 |
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Space Pilot
Group: Users
Venezuela
Messages: 115
Status: Offline
| HarbingerDawn, That's a relief, thank you! At this moment I don't have the camera in my hands but I have read in a forum that it did not have this feature. Thanks God it wasn't truth!
Edited by pzampella - Thursday, 07.05.2015, 19:43 |
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| midtskogen | Date: Thursday, 07.05.2015, 20:05 | Message # 477 |
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Star Engineer
Group: Users
Norway
Messages: 1674
Status: Offline
| As Harb says, a tripod doesn't help, but if you have a very short exposure time (say, 1/1000s), the problem is reduced. But with f/8 you don't get these short exposures unless you photograph the sun with a relatively weak ND filter.
NIL DIFFICILE VOLENTI
Edited by midtskogen - Thursday, 07.05.2015, 20:05 |
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| HarbingerDawn | Date: Thursday, 07.05.2015, 21:35 | Message # 478 |
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Cosmic Curator
Group: Administrators
United States
Messages: 8717
Status: Offline
| Quote pzampella ( ) I don't have the camera in my hands but I have read in a forum that it did not have this feature.
Well, it's possible that I'm wrong, but I used to have the Canon Rebel XS, which was an earlier model in the same product line, and it had that feature, and my current Rebel T3i also has it, so it would be extremely weird for the T5 to not have it.
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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| astroniki | Date: Monday, 18.05.2015, 20:55 | Message # 479 |
 Space Pilot
Group: SE team
Poland
Messages: 115
Status: Offline
| So i used a remote telescope at itelescope.net to capture this 10x300s image of M16
That's from a upgraded demo account I've spent a few bucks on.
Better deal than buying hardware for tens of thousands of dollars 
Check out my astrophotography:
http://www.astroniki.fbl.pl
http://www.facebook.com/AstroNiki1
Edited by astroniki - Monday, 18.05.2015, 21:05 |
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| Watsisname | Date: Friday, 22.05.2015, 07:54 | Message # 480 |
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Galaxy Architect
Group: Global Moderators
United States
Messages: 2613
Status: Offline
| Awesome image! Those remote telescopes seem like a pretty good deal.
How do the preparations for data collection work? Do you choose filters, observing period and calculate exposure times yourself?
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